Schnell, G. A. (1983). The Study of population: Elements, pattern processes. Merrill.
Chicago-čujuhus (17. p.)Schnell, George A. The Study of Population: Elements, Pattern Processes. London, Charles E.: Merrill, 1983.
MLA-čujuhus (9. p.)Schnell, George A. The Study of Population: Elements, Pattern Processes. Merrill, 1983.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.