APA (7th ed.) Citation

United States. National Park Service. (1961). Harpers Ferry National Monument. [U.S. Govt. Printing Office].

Chicago Style (17th ed.) Citation

United States. National Park Service. Harpers Ferry National Monument. [Washington]: [U.S. Govt. Printing Office], 1961.

MLA (9th ed.) Citation

United States. National Park Service. Harpers Ferry National Monument. [U.S. Govt. Printing Office], 1961.

Warning: These citations may not always be 100% accurate.