APA (7th ed.) Citation

United States. National Park Service. & United States. National Park Service. Denver Service Center. Statistical Office. (1979). National Park statistical abstract. U.S. Dept. of the Interior, National Park Service.

Chicago Style (17th ed.) Citation

United States. National Park Service., and United States. National Park Service. Denver Service Center. Statistical Office. National Park Statistical Abstract. [Washington, D.C.]: U.S. Dept. of the Interior, National Park Service, 1979.

MLA (8th ed.) Citation

United States. National Park Service., and United States. National Park Service. Denver Service Center. Statistical Office. National Park Statistical Abstract. U.S. Dept. of the Interior, National Park Service, 1979.