APA-ийн эшлэл(7 дахь хэвлэлт)

Conkin, P. (2007). The state of the earth: Environmental challenges on the road to 2100. Universities Press.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Conkin, Paul. The State of the Earth: Environmental Challenges on the Road to 2100. Hyderabad: Universities Press, 2007.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Conkin, Paul. The State of the Earth: Environmental Challenges on the Road to 2100. Universities Press, 2007.