APA-viite (7. p.)
Hays, S. P. (2009). The American people & the national forests: The first century of the U.S. Forest Service. University of Pittsburgh Press.
Chicago-viite (17. p.)
Hays, Samuel P. The American People & the National Forests: The First Century of the U.S. Forest Service. Pittsburgh, Pennsylvania: University of Pittsburgh Press, 2009.
MLA-viite (9. p.)
Hays, Samuel P. The American People & the National Forests: The First Century of the U.S. Forest Service. University of Pittsburgh Press, 2009.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.