Weeks, J. R. (1994). Population: An introduction to concepts and issues (5th ed.). Wadsworth Pub. Co..
Chicago-čujuhus (17. p.)Weeks, John Robert. Population: An Introduction to Concepts and Issues. 5th ed. Belmont, Calif.: Wadsworth Pub. Co., 1994.
MLA-čujuhus (9. p.)Weeks, John Robert. Population: An Introduction to Concepts and Issues. 5th ed. Wadsworth Pub. Co., 1994.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.