APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.