Dyfyniad APA

Cohen, J. E. (1995). How many people can the earth support? Norton.

Dyfyniad Arddull Chicago

Cohen, Joel E. How Many People Can the Earth Support? New York: Norton, 1995.

Dyfyniad MLA

Cohen, Joel E. How Many People Can the Earth Support? Norton, 1995.

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