APA

United Nations, . (1994). The Sex and age distribution of the world populations. New York: United Nations , Department for economic and social information and policy Analysis.

Chicago

United Nations, . 1994. The Sex and age distribution of the world populations. New York: United Nations , Department for economic and social information and policy Analysis.

Harvard

United Nations, . (1994). The Sex and age distribution of the world populations. New York: United Nations , Department for economic and social information and policy Analysis.

MLA

United Nations, . The Sex and age distribution of the world populations. New York: United Nations , Department for economic and social information and policy Analysis. 1994.