APA (7th ed.) Citation

United States. Office of Public Buildings and Public Parks of the National Capital. (1927). Manual for U.S. Park Police. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Office of Public Buildings and Public Parks of the National Capital. Manual for U.S. Park Police. Washington: U.S. GPO, 1927.

MLA (9th ed.) Citation

United States. Office of Public Buildings and Public Parks of the National Capital. Manual for U.S. Park Police. U.S. GPO, 1927.