APA (7th ed.) Citation

United States. National Park Service. (1953). Talks: Training bulletin for field employees of the National Park Service, United States Department of the Interior. The Service.

Chicago Style (17th ed.) Citation

United States. National Park Service. Talks: Training Bulletin for Field Employees of the National Park Service, United States Department of the Interior. Washington, D.C.: The Service, 1953.

MLA (9th ed.) Citation

United States. National Park Service. Talks: Training Bulletin for Field Employees of the National Park Service, United States Department of the Interior. The Service, 1953.