Cita APA

Keiter, R. B. (2013). To Conserve Unimpaired: The Evolution of the National Park Idea (1st ed. 2013.). Washington, DC: Island Press/Center for Resource Economics : Imprint: Island Press.

Citación estilo Chicago

Keiter, Robert B. To Conserve Unimpaired: The Evolution of the National Park Idea. 1st ed. 2013. Washington, DC: Island Press/Center for Resource Economics : Imprint: Island Press, 2013.

Cita MLA

Keiter, Robert B. To Conserve Unimpaired: The Evolution of the National Park Idea. 1st ed. 2013. Washington, DC: Island Press/Center for Resource Economics : Imprint: Island Press, 2013.