Cita APA (7th ed.)

(1972). DEMOGRAPHIC YEARBOOK/ANNUAIRE DEMOGRAPHIQUE, l971 (23.). United Nationas.

Cita Chicago (17th ed.)

DEMOGRAPHIC YEARBOOK/ANNUAIRE DEMOGRAPHIQUE, L971. 23. New York: United Nationas, 1972.

Cita MLA (8th ed.)

DEMOGRAPHIC YEARBOOK/ANNUAIRE DEMOGRAPHIQUE, L971. 23. United Nationas, 1972.