APA (7th ed.) Citation

United States. National Park Service. (1957). Information handbook: Questions and answers relating to the National Park Service and national park system. [U.S. Govt. Print. Off.].

Chicago Style (17th ed.) Citation

United States. National Park Service. Information Handbook: Questions and Answers Relating to the National Park Service and National Park System. [Washington, D.C.]: [U.S. Govt. Print. Off.], 1957.

MLA (9th ed.) Citation

United States. National Park Service. Information Handbook: Questions and Answers Relating to the National Park Service and National Park System. [U.S. Govt. Print. Off.], 1957.