Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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