Cita APA (7th ed.)
Steen, H. K. (2004). The U.S. Forest Service: A history (Centennial edition.). Forest History Society : University of Washington Press.
Cita Chicago (17th ed.)
Steen, Harold K. The U.S. Forest Service: A History. Centennial edition. Durham, North Carolina ; Seattle, Washington: Forest History Society : University of Washington Press, 2004.
Cita MLA (9th ed.)
Steen, Harold K. The U.S. Forest Service: A History. Centennial edition. Forest History Society : University of Washington Press, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.