APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Clarke. Population Geography. 2nd ed. Oxford New York: Pergamon Press, 1972.

MLA (8th ed.) Citation

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

Warning: These citations may not always be 100% accurate.