(1976). Yearbook of mining, non-ferrous metals, and products statistics. New York.
Chicago Style citaatYearbook of Mining, Non-ferrous Metals, and Products Statistics. New York, 1976.
MLA citatieYearbook of Mining, Non-ferrous Metals, and Products Statistics. New York, 1976.
Let op: Deze citaties zijn niet altijd 100% accuraat.