United Nations. Department of Economic and Social Affairs. (1970). Variables and questionnaire for comparative fertility surveys. [s.n.].
Chicago Style (17th ed.) CitationUnited Nations. Department of Economic and Social Affairs. Variables and Questionnaire for Comparative Fertility Surveys. New York: [s.n.], 1970.
MLA (9th ed.) CitationUnited Nations. Department of Economic and Social Affairs. Variables and Questionnaire for Comparative Fertility Surveys. [s.n.], 1970.
Warning: These citations may not always be 100% accurate.