APA (7th ed.) Citation

U.S. Fish and Wildlife Service. (1998). Gray wolf: Canis lupus. U.S. Fish and Wildlfie Service.

Chicago Style (17th ed.) Citation

U.S. Fish and Wildlife Service. Gray Wolf: Canis Lupus. [Washington, D.C.]: U.S. Fish and Wildlfie Service, 1998.

MLA (9th ed.) Citation

U.S. Fish and Wildlife Service. Gray Wolf: Canis Lupus. U.S. Fish and Wildlfie Service, 1998.