Clarke, J. I. (1972). Population geography (2nd ed.). Pergamon Press.
Chicago-čujuhus (17. p.)Clarke, John Innes. Population Geography. 2nd ed. Oxford: Pergamon Press, 1972.
MLA-čujuhus (9. p.)Clarke, John Innes. Population Geography. 2nd ed. Pergamon Press, 1972.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.