APA (7th ed.) Citation

National Geographic Society (U.S.), Vivendi Entertainment (Firm), & National Geographic Television & Film. (2011). National parks collection. National Geographic.

Chicago Style (17th ed.) Citation

National Geographic Society (U.S.), Vivendi Entertainment (Firm), and National Geographic Television & Film. National Parks Collection. [Washington, D.C.]: National Geographic, 2011.

MLA (9th ed.) Citation

National Geographic Society (U.S.), et al. National Parks Collection. National Geographic, 2011.