American Gas Association. Library Services Committee. Directory of gas industry libraries in the United States and Canada. American Gas Association.
Chicago Style (17th ed.) CitationAmerican Gas Association. Library Services Committee. Directory of Gas Industry Libraries in the United States and Canada. Arlington, Va.: American Gas Association.
MLA (9th ed.) CitationAmerican Gas Association. Library Services Committee. Directory of Gas Industry Libraries in the United States and Canada. American Gas Association.
Warning: These citations may not always be 100% accurate.