United Nations. Ad Hoc Expert Group on Demographic Projections. (1984). Population projections, methodology of the United Nations: Papers of the United Nations Ad Hoc Expert Group on Demographic Projections, United Nations Headquarters, 16-19 November 1981. United Nations.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিUnited Nations. Ad Hoc Expert Group on Demographic Projections. Population Projections, Methodology of the United Nations: Papers of the United Nations Ad Hoc Expert Group on Demographic Projections, United Nations Headquarters, 16-19 November 1981. New York: United Nations, 1984.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিUnited Nations. Ad Hoc Expert Group on Demographic Projections. Population Projections, Methodology of the United Nations: Papers of the United Nations Ad Hoc Expert Group on Demographic Projections, United Nations Headquarters, 16-19 November 1981. United Nations, 1984.