Little, R. J. A. (1982). Sampling errors of fertility rates from the WFS. International Statistical Institute; World Fertility Survey.
Lua i Stíl Chicago (17ú heag.)Little, Roderick J. A. Sampling Errors of Fertility Rates from the WFS. Voorburg, Netherlands : London, U. K.: International Statistical Institute; World Fertility Survey, 1982.
Lua MLA (8ú heag.)Little, Roderick J. A. Sampling Errors of Fertility Rates from the WFS. International Statistical Institute; World Fertility Survey, 1982.
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