APA (7th ed.) Citation

Petroleum Institute of the Philippines, Inc. (1971). Topics on the oil industry. s.n.

Chicago Style (17th ed.) Citation

Petroleum Institute of the Philippines, Inc. Topics on the Oil Industry. [Manila: s.n, 1971.

MLA (9th ed.) Citation

Petroleum Institute of the Philippines, Inc. Topics on the Oil Industry. s.n, 1971.

Warning: These citations may not always be 100% accurate.