APA-ийн эшлэл(7 дахь хэвлэлт)

Lowenthal, D. (2003). George Perkins Marsh: Prophet of conservation. University of Washington Press.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Lowenthal, David. George Perkins Marsh: Prophet of Conservation. Seattle, WA: University of Washington Press, 2003.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Lowenthal, David. George Perkins Marsh: Prophet of Conservation. University of Washington Press, 2003.