Wolbert, G. S. (1952). American pipe lines, their industrial structure, economic status, and legal implications. University of Oklahoma Press.
Chicago-referens (17:e uppl.)Wolbert, George S. American Pipe Lines, Their Industrial Structure, Economic Status, and Legal Implications. Norman: University of Oklahoma Press, 1952.
MLA-referens (9:e uppl.)Wolbert, George S. American Pipe Lines, Their Industrial Structure, Economic Status, and Legal Implications. University of Oklahoma Press, 1952.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.