Petroleum sourcebook: A regional bibliography of petroleum information. National Petroleum Bibliography.
Chicago Style (17th ed.) CitationPetroleum Sourcebook: A Regional Bibliography of Petroleum Information. [Amarillo, Tex.]: National Petroleum Bibliography.
MLA (9th ed.) CitationPetroleum Sourcebook: A Regional Bibliography of Petroleum Information. National Petroleum Bibliography.
Warning: These citations may not always be 100% accurate.