APA

United Nations. Bureau of Social Affairs P. B., . (1954). Future population estimates by sex and age : report I : the population of Central America including México 1950-1980. New York: Universidad de New York.

Chicago

United Nations. Bureau of Social Affairs Population Branch, . 1954. Future population estimates by sex and age : report I : the population of Central America including México 1950-1980. New York: Universidad de New York.

Harvard

United Nations. Bureau of Social Affairs P. B., . (1954). Future population estimates by sex and age : report I : the population of Central America including México 1950-1980. New York: Universidad de New York.

MLA

United Nations. Bureau of Social Affairs Population Branch, . Future population estimates by sex and age : report I : the population of Central America including México 1950-1980. New York: Universidad de New York. 1954.