Citazione Stile APA (7a Edizione)

Discovery Channel School, Entrex Software, QuickTime, & World Book. (2004). Ecology [computer file]. Discovery Communications, Inc.

Citazione stile Chigago Style (17a edizione)

Discovery Channel School, Entrex Software, QuickTime, e World Book. Ecology [computer File]. [U.S.A.]: Discovery Communications, Inc, 2004.

Citatione MLA (9a ed.)

Discovery Channel School, et al. Ecology [computer File]. Discovery Communications, Inc, 2004.