Rethinking the national parks for the 21st century :
National Park System Advisory Board report 2001.

APA Citation

United States. National Park System Advisory Board., Franklin, J. Hope., National Geographic Society (U.S.). (2001). Rethinking the national parks for the 21st century: National Park System Advisory Board report 2001. Washington, D.C.: National Geographic Society.

MLA Citation

United States. National Park System Advisory Board, John Hope Franklin, and National Geographic Society (U.S.). Rethinking the National Parks for the 21st Century: National Park System Advisory Board Report 2001. Washington, D.C.: National Geographic Society, 2001.