APA (7th ed.) Citation

Rettie, D. F. (1995). Our national park system: Caring for America's greatest natural and historic treasures. Univ. of Illinois Press.

Chicago Style (17th ed.) Citation

Rettie, Dwight F. Our National Park System: Caring for America's Greatest Natural and Historic Treasures. Urbana [u.a.]: Univ. of Illinois Press, 1995.

MLA (9th ed.) Citation

Rettie, Dwight F. Our National Park System: Caring for America's Greatest Natural and Historic Treasures. Univ. of Illinois Press, 1995.