APA (7th ed.) Citation

Worster, D. (1992). Under western skies: Nature and history in the American West. Oxford Univ. Press.

Chicago Style (17th ed.) Citation

Worster, Donald. Under Western Skies: Nature and History in the American West. New York u.a: Oxford Univ. Press, 1992.

MLA (9th ed.) Citation

Worster, Donald. Under Western Skies: Nature and History in the American West. Oxford Univ. Press, 1992.