2012. “Exploring the Yo-Yo: Filipino Physics Fun.” Science Activities 49 (1): 29–35. doi:10.1080/00368121.2011.591449.
8, Posted May. “Out of This World: A Brief History of the Yo-Yo.” Out of This World: A Brief History of the Yo-Yo | The Strong, Last modified August 20, 2019. https://www.museumofplay.org/blog/play-stuff/2017/05/out-of-this-world-a-brief-history-of-the-yo-yo.
“Advice to Joe [1951].” CONELRAD. Accessed December 2, 2019. http://www.conelrad.com/media/atomicmusic/platter_07.html.
AncientPages.com, and Decoding Ancient Secrets Of Fascinating Virupaksha Temple Archaeology | Nov 15. “Oldest Yo-Yo Dates Back To 400-500 B.C.” Ancient Pages, Last modified May 13, 2019. http://www.ancientpages.com/2019/05/13/oldest-yo-yo-dates-back-to-400-500-b-c/.
“Authentic Wooden Yo-Yo Pro.” Mastermind Toys. Accessed December 2, 2019. https://www.mastermindtoys.com/91-Authentic-Wooden-Yo-Yo-Pro.aspx.
Bellis, Mary. “He Did Not Invent the Yo-Yo, but He Sure Made It Famous.” ThoughtCo. Last modified July 1, 2019. https://www.thoughtco.com/the-history-of-the-yoyo-1992695.
Cavette, Michael. Encyclopedia.com. Last modified November 18, 2019. https://www.encyclopedia.com/sports-and-everyday-life/games/games-and-hobbies/yo-yo.
“Chinese Yo-Yo : Diabolo.” Discovering Mandarin. Accessed December 2, 2019. http://discoveringmandarin.blogspot.com/2009/08/chinese-yo-yo-diabolo.html.
Conover, Ernie. “Yo-Yos and Spinning Tops.” Woodworker’s Journal 38, no. 6 (December 2014): 24. http://search.ebscohost.com/login.aspx?direct=true&db=f5h&AN=99122748&site=ehost-live.
Crosby, David F. 2002. “The Yo-Yo: Its Rise and Fall.” American History 37 (3): 52. http://search.ebscohost.com/login.aspx?direct=true&db=f5h&AN=6782918&site=ehost-live.
“Donald Duncan.” Palm Springs Celebrity Homes – Celebrity Homes For Sale Palm Springs. Accessed December 2, 2019. http://pscelebrityhomes.com/celebrity-index-d-f/donald-duncan-movie-colony.
“Duncan Yo-Yo.” Duncan Yo-Yo | National Toy Hall of Fame. Accessed December 2, 2019. https://www.toyhalloffame.org/toys/duncan-yo-yo.
FamilyGamerTV. “Duncan Yo-Yo Hero & History of Yo-Yos with Takeshi Kamisato.” YouTube. Last modified April 11, 2014. https://www.youtube.com/watch?v=iU8DkyHKz6I.
Filipino-Americans. “Inventor of Flores Yo-Yo: A Philippine Immigrant Defying Odds in the Great Depression.” Inventor of Flores Yo-Yo: A Philippine Immigrant Defying Odds in the Great Depression, Last modified January 1, 1970. http://ucifilam.blogspot.com/2009/11/inventor-of-flores-yo-yo-philippine.html.
Goto-Jones, Chris. “The High-Stakes World of High-End Yo Yos.” The Atlantic. Last modified April 9, 2015. https://www.theatlantic.com/technology/archive/2015/04/the-yo-yo-effect/389868/.
“How Do Yo-Yos Work?: Who Invented Yo-Yos?” Explain That Stuff, Last modified July 21, 2018. https://www.explainthatstuff.com/yoyos.html.
Izarra, Charles De. “Mechanical Study of a Modern Yo-Yo.” European Journal of Physics 32, no. 4 (2011): 1097–1106. doi:10.1088/0143-0807/32/4/022.
Krupa, E, and W Tanska-Krupa. “Newtons Second Law and the Physics of the Yo-Yo.” Physics Education 32, no. 3 (1997): 185–87. doi:10.1088/0031-9120/32/3/019.
Larsdh. “Pedro Flores Yoyo.” Flickr. Last modified October 5, 2013. https://www.flickr.com/photos/97651231@N00/10106820623.
Meisenheimer, Lucky. “National Yo-Yo Museum: Pedro Flores.” National Yo-Yo Museum | Pedro Flores. Accessed December 2, 2019. https://web.archive.org/web/20080120172822/http://www.nationalyoyo.org/museum/pedroflores.htm.
“Pedro Flores Yo Yo.” THE HARLOW, Last modified May 20, 2013. http://theharlow.net/tag/pedro-flores-yo-yo/.
Museen zu Berlin. “Museums & Institutions – Antikensammlung.” Staatliche Museen Zu Berlin. Finanzgruppe, 2019. Last modified 2019. Accessed December 1, 2019. https://www.smb.museum/en/museums-institutions/antikensammlung/home.html.
“National Yo-Yo Museum.” National Yo-Yo Musem. Accessed December 2, 2019. https://nationalyoyo.org/.
NBC Bay Area Proud. “Oseph Harris and the Asian History behind the YoYo.” YouTube. Last modified July 8, 2015. https://www.youtube.com/watch?v=2ZkR_nDrBm0.
Oliver, Valerie. “ History Of The Yo-Yo.” Museum of Yo-Yo History. Accessed December 2, 2019. http://www.yoyomuseum.com/museum_view.php?action=profiles&subaction=yoyo.
Ordoñez Aristizabal, Daniela. “Fotos.” Revolucion Francesa. Facebook Historical, 2018. Last modified 2018. Accessed December 1, 2019. https://facerevolucionfran.wixsite.com/revolucion-francesa/copia-de-fotos-3?lightbox=dataItem-jidrld312.
“Roy Acuff Teaches President Nixon the Yo-Yo at the Grand Ole Opry.” Billboard, Last modified March 14, 2014. https://www.billboard.com/video/roy-acuff-teaches-president-nixon-the-yo-yo-at-the-grand-ole-opry-5937538.
Ted Talk. “My Journey to Yo-Yo Mastery.” YouTube. Last modified April 19, 2013. https://www.youtube.com/watch?v=gnuFrtTNUTc.
“The Deceptive Simplicity of a Metamorphic Rock.” Metageologist. Accessed December 2, 2019. http://all-geo.org/metageologist/2016/12/the-deceptive-simplicity-of-a-metamorphic-rock/.
“US6331132B1 – Yo-Yo Having Improved Tether Tension Control and Adjustable Mechanism.” Google Patents. Accessed December 2, 2019. https://patents.google.com/patent/US6331132.
“US7192330B2 – Yo-Yo Having Adjustable Responsiveness.” Google Patents. Accessed December 2, 2019. https://patents.google.com/patent/US7192330.
VideoFromSpace. “Yo-Yo Tricks In Space – Astronauts Tests His Skills .” YouTube. Last modified August 10, 2012. https://www.youtube.com/watch?v=bpljytIwcaQ.
“Whirligig.” Whirligig – Ohio History Central. Accessed December 2, 2019. https://ohiohistorycentral.org/w/Whirligig.
YoPromotionsUK. “Remember the 80’s Yo-Yo Craze.” YouTube. YouTube, August 24, 2010. https://www.youtube.com/watch?v=LbviSr-vLqw.
“Yo-Yo’s.” Yo-Yo’s, Last modified July 21, 2015. http://creekbed.org/collection/yoyo.htm.
To see Bibliography in Word Document download link below: