Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.