APA (7th ed.) Citation

National Park Foundation. (1991). The Complete guide to America's national parks: The official visitor's guide of the National Park Foundation : comprehensive information on all 358 of America's national park areas (1992-1993 ed.). National Park Foundation.

Chicago Style (17th ed.) Citation

National Park Foundation. The Complete Guide to America's National Parks: The Official Visitor's Guide of the National Park Foundation : Comprehensive Information on All 358 of America's National Park Areas. 1992-1993 ed. [Washington, D.C.]: National Park Foundation, 1991.

MLA (9th ed.) Citation

National Park Foundation. The Complete Guide to America's National Parks: The Official Visitor's Guide of the National Park Foundation : Comprehensive Information on All 358 of America's National Park Areas. 1992-1993 ed. National Park Foundation, 1991.