United Nations. (1971). Statistical yearbook: Annuaire statistique 1970. New York: United Nations.
Trích dẫn kiểu ChicagoUnited Nations. Statistical Yearbook: Annuaire Statistique 1970. New York: United Nations, 1971.
MLA引文United Nations. Statistical Yearbook: Annuaire Statistique 1970. New York: United Nations, 1971.
警告:這些引文格式不一定是100%准確.