Παραπομπή σε μορφή APA (7η εκδ.)

United Nations. Dept. of Economic and Social Affairs. (1989). Global estimates and projections of population by sex and age: The 1988 revision. United Nations.

Παραπομπή σε μορφή Chicago (17η εκδ.)

United Nations. Dept. of Economic and Social Affairs. Global Estimates and Projections of Population by Sex and Age: The 1988 Revision. New York: United Nations, 1989.

Παραπομπή σε μορφή MLA (8th εκδ.)

United Nations. Dept. of Economic and Social Affairs. Global Estimates and Projections of Population by Sex and Age: The 1988 Revision. United Nations, 1989.