APA-viite (7. p.)

Hays, S. (1972). #aConservation and the gospel of efficiency: The progressive conservation movement, 1890-1920. Atheneum.

Chicago-viite (17. p.)

Hays, Samuel. #aConservation and the Gospel of Efficiency: The Progressive Conservation Movement, 1890-1920. New York: Atheneum, 1972.

MLA-viite (9. p.)

Hays, Samuel. #aConservation and the Gospel of Efficiency: The Progressive Conservation Movement, 1890-1920. Atheneum, 1972.