APA-viite (7. p.)
Steen, H. K. (2004). The U.S. Forest Service: A history (Centennial edition.). Forest History Society : University of Washington Press.
Chicago-viite (17. p.)
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.
MLA-viite (9. p.)
Steen, Harold K. The U.S. Forest Service: A History. Centennial edition. Forest History Society : University of Washington Press, 2004.
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