APA-Zitierstil (7. Ausg.)

Hays, S. P. (1979). Conservation and the gospel of efficiency: The progressive conservation movement, 1890-1920. With a new pref. by the author (5. print.). Atheneum.

Chicago-Zitierstil (17. Ausg.)

Hays, Samuel P. Conservation and the Gospel of Efficiency: The Progressive Conservation Movement, 1890-1920. With a New Pref. by the Author. 5. print. New York: Atheneum, 1979.

MLA-Zitierstil (9. Ausg.)

Hays, Samuel P. Conservation and the Gospel of Efficiency: The Progressive Conservation Movement, 1890-1920. With a New Pref. by the Author. 5. print. Atheneum, 1979.