(1997). United Nations conference on trade and development: Handbook of world mineral trade statistics 1990 - 1995. New York: United Nations.
Trích dẫn kiểu ChicagoUnited Nations Conference On Trade and Development: Handbook of World Mineral Trade Statistics 1990 - 1995. New York: United Nations, 1997.
MLA引文United Nations Conference On Trade and Development: Handbook of World Mineral Trade Statistics 1990 - 1995. New York: United Nations, 1997.
警告:這些引文格式不一定是100%准確.