APA (7th ed.) Citation

Duldulao, M. D. (1987). The Filipinos: Portrait of a people. Oro Books, Inc.

Chicago Style (17th ed.) Citation

Duldulao, Manuel D. The Filipinos: Portrait of a People. Manila: Oro Books, Inc, 1987.

MLA (9th ed.) Citation

Duldulao, Manuel D. The Filipinos: Portrait of a People. Oro Books, Inc, 1987.