APA (7th ed.) Citation

Orr, J. F. (1979). The American national park system: A selected review. Vance.

Chicago Style (17th ed.) Citation

Orr, James F. The American National Park System: A Selected Review. Monticello, Ill: Vance, 1979.

MLA (9th ed.) Citation

Orr, James F. The American National Park System: A Selected Review. Vance, 1979.

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