United Nations. (1971). Statistical yearbook: Annuaire statistique 1970. New York: United Nations.
Citación estilo ChicagoUnited Nations. Statistical Yearbook: Annuaire Statistique 1970. New York: United Nations, 1971.
Cita MLAUnited Nations. Statistical Yearbook: Annuaire Statistique 1970. New York: United Nations, 1971.
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