APA (7th ed.) Citation

United States. National Park Service. (2011). Foundation statement: Joshua Tree National Park, California. U.S. Department of the Interior, National Park Service.

Chicago Style (17th ed.) Citation

United States. National Park Service. Foundation Statement: Joshua Tree National Park, California. [Washington, D.C.]: U.S. Department of the Interior, National Park Service, 2011.

MLA (9th ed.) Citation

United States. National Park Service. Foundation Statement: Joshua Tree National Park, California. U.S. Department of the Interior, National Park Service, 2011.