Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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