Cita APA (7th ed.)

United Nations. Department of Economic and Social Affairs. (1970). Variables and questionnaire for comparative fertility surveys. [s.n.].

Cita Chicago (17th ed.)

United Nations. Department of Economic and Social Affairs. Variables and Questionnaire for Comparative Fertility Surveys. New York: [s.n.], 1970.

Cita MLA (9th ed.)

United Nations. Department of Economic and Social Affairs. Variables and Questionnaire for Comparative Fertility Surveys. [s.n.], 1970.