Cita APA (7th ed.)

Clarke, J. I. (1972). Population geography (2nd ed.). Pergamon Press.

Cita Chicago (17th ed.)

Clarke, John Innes. Population Geography. 2nd ed. Oxford: Pergamon Press, 1972.

Cita MLA (9th ed.)

Clarke, John Innes. Population Geography. 2nd ed. Pergamon Press, 1972.