Petroleum Institute of the Philippines, Inc. (1962). The refining and marketing of petroleum in the Philippines. s.n.
Chicago-referens (17:e uppl.)Petroleum Institute of the Philippines, Inc. The Refining and Marketing of Petroleum in the Philippines. [Manila: s.n, 1962.
MLA-referens (9:e uppl.)Petroleum Institute of the Philippines, Inc. The Refining and Marketing of Petroleum in the Philippines. s.n, 1962.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.