APA

(1971). Methods of projecting the economically active population. New York, New York, United States: United Nations. Department of Economic and Social Affairs.

Chicago

1971. Methods of projecting the economically active population. New York, New York, United States: United Nations. Department of Economic and Social Affairs.

Harvard

(1971). Methods of projecting the economically active population. New York, New York, United States: United Nations. Department of Economic and Social Affairs.

MLA

Methods of projecting the economically active population. New York, New York, United States: United Nations. Department of Economic and Social Affairs. 1971.