APA (7th ed.) Citation

United States. National Park Service. (1971). National Park guide for the handicapped. for sale by the Supt. of Docs., U.S. Govt. Print. Off..

Chicago Style (17th ed.) Citation

United States. National Park Service. National Park Guide for the Handicapped. [Washington, D.C.: for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1971.

MLA (8th ed.) Citation

United States. National Park Service. National Park Guide for the Handicapped. for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1971.