APA-ийн эшлэл(7 дахь хэвлэлт)

Wright, R. T. (2004). Environmental science: Toward a sustainable future. PHI.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Wright, Richard T. Environmental Science: Toward a Sustainable Future. New Delhi: PHI, 2004.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Wright, Richard T. Environmental Science: Toward a Sustainable Future. PHI, 2004.