Não informado. (1961). Petroleum Abstracts. University of Tulsa, Information Services Division.
Chicagoスタイル(17版)引用形式Não informado. Petroleum Abstracts. Tulsa, Okla: University of Tulsa, Information Services Division, 1961.
MLA(8版)引用形式Não informado. Petroleum Abstracts. University of Tulsa, Information Services Division, 1961.
警告: この引用は必ずしも正確ではありません.