APA (7th ed.) Citation

U.S. Fish and Wildlife Service. (1994). Gray wolf: Canis lupus. U.S. Fish & Wildlife Service.

Chicago Style (17th ed.) Citation

U.S. Fish and Wildlife Service. Gray Wolf: Canis Lupus. [Pierre, S.D.]: U.S. Fish & Wildlife Service, 1994.

MLA (9th ed.) Citation

U.S. Fish and Wildlife Service. Gray Wolf: Canis Lupus. U.S. Fish & Wildlife Service, 1994.