APA (7th ed.) Citation

Ostrea, E. (2010). Outlook of gold refining in the Philippine islands. Philippine Engineering Journal.

Chicago Style (17th ed.) Citation

Ostrea, Enrique. "Outlook of Gold Refining in the Philippine Islands." Philippine Engineering Journal 2010.

MLA (9th ed.) Citation

Ostrea, Enrique. "Outlook of Gold Refining in the Philippine Islands." Philippine Engineering Journal, 2010.

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