APA (7th ed.) Citation

United States. National Park Service. (2007). [National park system map and guide ([2007 rev. ed.].). [U.S. Dept. of the Interior, National Park Service].

Chicago Style (17th ed.) Citation

United States. National Park Service. [National Park System Map and Guide. [2007 rev. ed.]. [Washington, DC]: [U.S. Dept. of the Interior, National Park Service], 2007.

MLA (9th ed.) Citation

United States. National Park Service. [National Park System Map and Guide. [2007 rev. ed.]. [U.S. Dept. of the Interior, National Park Service], 2007.