(1976). Yearbook of mining, non-ferrous metals, and products statistics. New York.
Trích dẫn kiểu ChicagoYearbook of Mining, Non-ferrous Metals, and Products Statistics. New York, 1976.
MLA引文Yearbook of Mining, Non-ferrous Metals, and Products Statistics. New York, 1976.
警告:這些引文格式不一定是100%准確.