Clarke, J. I. (1973). Population geography ([2nd ed. repr.].). Pergamon Press.
Cita Chicago Style (17a ed.)Clarke, John Innes. Population Geography. [2nd ed. repr.]. Oxford [etc.]: Pergamon Press, 1973.
Cita MLA (9a ed.)Clarke, John Innes. Population Geography. [2nd ed. repr.]. Pergamon Press, 1973.
Precaución: Estas citas no son 100% exactas.