APA (7 ম সংস্করণ) উদ্ধৃতি

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

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

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

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

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