Citazione Stile APA (7a Edizione)

National Geographic Society U.S. (1976). The Right Whale: The endangered species. National Geographic Society.

Citazione stile Chigago Style (17a edizione)

National Geographic Society U.S. The Right Whale: The Endangered Species. [Washington, D.C.]: National Geographic Society, 1976.

Citatione MLA (9a ed.)

National Geographic Society U.S. The Right Whale: The Endangered Species. National Geographic Society, 1976.