Não informado. (1970). Pipeline and Gas Journal. Petroleum Engineer Publishing.
Chicagoスタイル(17版)引用形式Não informado. Pipeline and Gas Journal. Dallas, Tex: Petroleum Engineer Publishing, 1970.
MLA(8版)引用形式Não informado. Pipeline and Gas Journal. Petroleum Engineer Publishing, 1970.
警告: この引用は必ずしも正確ではありません.