Não informado. (2017). Hart's Petroleum Engineer International: The magazine of drilling and production technology, onshore, offshore, worldwide. Hart Publications.
Chicago-referens (17:e uppl.)Não informado. Hart's Petroleum Engineer International: The Magazine of Drilling and Production Technology, Onshore, Offshore, Worldwide. Houston, Tex: Hart Publications, 2017.
MLA-referens (8:e uppl.)Não informado. Hart's Petroleum Engineer International: The Magazine of Drilling and Production Technology, Onshore, Offshore, Worldwide. Hart Publications, 2017.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.