APA-ийн эшлэл(7 дахь хэвлэлт)

Singer, P. (2000). A Darwinian Left: Politics, evolution, and cooperation. Yale University Press.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Singer, Peter. A Darwinian Left: Politics, Evolution, and Cooperation. New Haven: Yale University Press, 2000.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Singer, Peter. A Darwinian Left: Politics, Evolution, and Cooperation. Yale University Press, 2000.