Cita APA (7th ed.)

U.N. Department of Economic and Social Affairs. (1977). World population prospects as assessed in 1973. s.n.

Cita Chicago (17th ed.)

U.N. Department of Economic and Social Affairs. World Population Prospects as Assessed in 1973. New York: s.n, 1977.

Cita MLA (9th ed.)

U.N. Department of Economic and Social Affairs. World Population Prospects as Assessed in 1973. s.n, 1977.