APA (7th ed.) Citation

Discovery Channel (Firm). (2003). Philadelphia (2nd ed., updated.). APA Publications.

Chicago Style (17th ed.) Citation

Discovery Channel (Firm). Philadelphia. 2nd ed., updated. Singapore: APA Publications, 2003.

MLA (9th ed.) Citation

Discovery Channel (Firm). Philadelphia. 2nd ed., updated. APA Publications, 2003.

Warning: These citations may not always be 100% accurate.