APA (7th ed.) Citation

CLARKE, J. I. (1972). Population geography.-- ed.2. Pergamon Press.

Chicago Style (17th ed.) Citation

CLARKE, John I. Population Geography.-- Ed.2. Oxford: Pergamon Press, 1972.

MLA (9th ed.) Citation

CLARKE, John I. Population Geography.-- Ed.2. Pergamon Press, 1972.