APA (7th ed.) Citation

Discovery Channel (Firm) & Gaiam Media. (2011). Earth collection. Discovery Channel ; [Distributed by] Gaiam.

Chicago Style (17th ed.) Citation

Discovery Channel (Firm) and Gaiam Media. Earth Collection. [United States] : Boulder, CO: Discovery Channel ; [Distributed by] Gaiam, 2011.

MLA (9th ed.) Citation

Discovery Channel (Firm) and Gaiam Media. Earth Collection. Discovery Channel ; [Distributed by] Gaiam, 2011.

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