APA-viite (7. p.)
Lowenthal, D. (2003). George Perkins Marsh: Prophet of conservation. University of Washington Press.
Chicago-viite (17. p.)
Lowenthal, David. George Perkins Marsh: Prophet of Conservation. Seattle, WA: University of Washington Press, 2003.
MLA-viite (9. p.)
Lowenthal, David. George Perkins Marsh: Prophet of Conservation. University of Washington Press, 2003.
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