United Nations, D. o. E. a. S. A. (1970). Variables and questionaire for comparative fertility surveys: (Population Studies No. 45). United Nations.
Chicago-čujuhus (17. p.)United Nations, Dept. of Economic and Social Affairs. Variables and Questionaire for Comparative Fertility Surveys: (Population Studies No. 45). New York: United Nations, 1970.
MLA-čujuhus (9. p.)United Nations, Dept. of Economic and Social Affairs. Variables and Questionaire for Comparative Fertility Surveys: (Population Studies No. 45). United Nations, 1970.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.