APA (7th ed.) Citation

United States. National Park Service. (1991). Petrified Forest National Park: Draft general management plan, development concept plans, environmental impact statement. U.S. Dept. of the Interior, National Park Service.

Chicago Style (17th ed.) Citation

United States. National Park Service. Petrified Forest National Park: Draft General Management Plan, Development Concept Plans, Environmental Impact Statement. Denver, CO: U.S. Dept. of the Interior, National Park Service, 1991.

MLA (9th ed.) Citation

United States. National Park Service. Petrified Forest National Park: Draft General Management Plan, Development Concept Plans, Environmental Impact Statement. U.S. Dept. of the Interior, National Park Service, 1991.