Não informado. (1958). Lead Abstracts. Lead Development Association.
Chicagoスタイル(17版)引用形式Não informado. Lead Abstracts. London: Lead Development Association, 1958.
MLA(8版)引用形式Não informado. Lead Abstracts. Lead Development Association, 1958.
警告: この引用は必ずしも正確ではありません.