APA (7th ed.) Citation

Cameron, J. (1974). The National Park Service: Its history, activities, and organization. AMS Press.

Chicago Style (17th ed.) Citation

Cameron, Jenks. The National Park Service: Its History, Activities, and Organization. New York: AMS Press, 1974.

MLA (9th ed.) Citation

Cameron, Jenks. The National Park Service: Its History, Activities, and Organization. AMS Press, 1974.