United Nations. Department of International Economic and Social Affairs. (1990). Patterns of first marriage: Timing and prevalence. United Nations.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUnited Nations. Department of International Economic and Social Affairs. Patterns of First Marriage: Timing and Prevalence. New York: United Nations, 1990.
एमएलए (9वां संस्करण) प्रशस्ति पत्रUnited Nations. Department of International Economic and Social Affairs. Patterns of First Marriage: Timing and Prevalence. United Nations, 1990.
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