APA (7th ed.) Citation

U.S. Fish and Wildlife Service. (1995). American alligator: Alligator mississippiensis. The Service.

Chicago Style (17th ed.) Citation

U.S. Fish and Wildlife Service. American Alligator: Alligator Mississippiensis. [Washingon, D.C.?]: The Service, 1995.

MLA (9th ed.) Citation

U.S. Fish and Wildlife Service. American Alligator: Alligator Mississippiensis. The Service, 1995.