توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

United Nations Department of International Economic and Social Affairs. (1991). Concise report on the world population situation in 1991, with a special emphasis on age structure. United Nations.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

United Nations Department of International Economic and Social Affairs. Concise Report on the World Population Situation in 1991, with a Special Emphasis on Age Structure. New York: United Nations, 1991.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

United Nations Department of International Economic and Social Affairs. Concise Report on the World Population Situation in 1991, with a Special Emphasis on Age Structure. United Nations, 1991.