APA (7th ed.) Citation

Clarke, J. I. (1971). Population geography and the developing countries ([1st ed.].). Pergamon Press.

Chicago Style (17th ed.) Citation

Clarke, John I. Population Geography and the Developing Countries. [1st ed.]. Oxford, New York: Pergamon Press, 1971.

MLA (8th ed.) Citation

Clarke, John I. Population Geography and the Developing Countries. [1st ed.]. Pergamon Press, 1971.