Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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