Não informado. (1961). Society of Petroleum Engineers Journal. Society of Petroleum Engineers.
Chicagoスタイル(17版)引用形式Não informado. Society of Petroleum Engineers Journal. Dallas, Tex: Society of Petroleum Engineers, 1961.
MLA(8版)引用形式Não informado. Society of Petroleum Engineers Journal. Society of Petroleum Engineers, 1961.
警告: この引用は必ずしも正確ではありません.