Herman, Leonard (1997). Phoenix: the fall & rise of videogames (2nd edición). Union, NJ: Rolenta Press. p. 20. ISBN0-9643848-2-5. Consultado el 16 de febrero de 2012. «Like Pong, Telstar could only play video tennis but it retailed at an inexpensive $50 that made it attractive to most families that were on a budget. Coleco managed to sell over a million units that year.»
colecomuseum.com
«Archived copy». Archivado desde el original el 4 de octubre de 2009. Consultado el 30 de septiembre de 2009.
issn.org
portal.issn.org
Kaplan, Deeny, ed. (Winter 1978). «The Video Games». Video(Buyer's Guide) (Reese Communications) 1 (1): 17-30. ISSN0147-8907.