Não informado. (1978). API Abstracts/Literature. American Petroleum Institute.
Chicagoスタイル(17版)引用形式Não informado. API Abstracts/Literature. New York: American Petroleum Institute, 1978.
MLA(8版)引用形式Não informado. API Abstracts/Literature. American Petroleum Institute, 1978.
警告: この引用は必ずしも正確ではありません.