Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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