APA (7th ed.) Citation
Hays, S. P. (1999). Conservation and the gospel of efficiency: The progressive conservation movement, 1890-1920. University of Pittsburgh Press.
Chicago Style (17th ed.) Citation
Hays, Samuel P. Conservation and the Gospel of Efficiency: The Progressive Conservation Movement, 1890-1920. Pittsburgh, Pennsylvania: University of Pittsburgh Press, 1999.
MLA (9th ed.) Citation
Hays, Samuel P. Conservation and the Gospel of Efficiency: The Progressive Conservation Movement, 1890-1920. University of Pittsburgh Press, 1999.
Warning: These citations may not always be 100% accurate.