Hays, S. P. (2009). The American people & the national forests: The first century of the U.S. Forest Service. University of Pittsburgh Press.
Citação do estilo Chicago (17ª ed.)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.
Citação MLA (9ª ed.)Hays, Samuel P. The American People & the National Forests: The First Century of the U.S. Forest Service. University of Pittsburgh Press, 2009.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.