APA (7th ed.) Citation

United States. National Park Service. (1981). Park science. National Park Service.

Chicago Style (17th ed.) Citation

United States. National Park Service. Park Science. Corvallis, OR: National Park Service, 1981.

MLA (9th ed.) Citation

United States. National Park Service. Park Science. National Park Service, 1981.

Warning: These citations may not always be 100% accurate.