World Fertility Survey. (1980). The Guyana fertility survey, 1975: A summary of findings. International Statistical Institute ; World Fertility Survey.
Citace podle Chicago (17th ed.)World Fertility Survey. The Guyana Fertility Survey, 1975: A Summary of Findings. Voorburg, Netherlands : London: International Statistical Institute ; World Fertility Survey, 1980.
Citace podle MLA (8th ed.)World Fertility Survey. The Guyana Fertility Survey, 1975: A Summary of Findings. International Statistical Institute ; World Fertility Survey, 1980.
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