Não informado. (1970). Copper abstracts. International Copper Development Council.
Chicago Style (17th ed.) CitationNão informado. Copper Abstracts. Geneva, Suíça: International Copper Development Council, 1970.
MLA (8th ed.) CitationNão informado. Copper Abstracts. International Copper Development Council, 1970.
Warning: These citations may not always be 100% accurate.