APA (7th ed.) Citation

United States National Park Service. (1965). Outdoor recreation in the National Capital Region. National Capital Open Space Program.

Chicago Style (17th ed.) Citation

United States National Park Service. Outdoor Recreation in the National Capital Region. Washington, D.C: National Capital Open Space Program, 1965.

MLA (9th ed.) Citation

United States National Park Service. Outdoor Recreation in the National Capital Region. National Capital Open Space Program, 1965.