Cita APA (7a ed.)

Cohen, J. E. (1995). How many people can the earth support? (1st edition.). W.W.Norton.

Cita Chicago Style (17a ed.)

Cohen, Joel E. How Many People Can the Earth Support? 1st edition. New York: W.W.Norton, 1995.

Cita MLA (8a ed.)

Cohen, Joel E. How Many People Can the Earth Support? 1st edition. W.W.Norton, 1995.