Não informado. (1935). Petroleum technology. Institution of Petroleum Technologists.
Chicago-referens (17:e uppl.)Não informado. Petroleum Technology. London: Institution of Petroleum Technologists, 1935.
MLA-referens (8:e uppl.)Não informado. Petroleum Technology. Institution of Petroleum Technologists, 1935.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.