APA (7th ed.) Citation

Ocampo, A. R. (1999). Pre-Spanish Filipinos knew how to write. Philippine Daily Inquirer.

Chicago Style (17th ed.) Citation

Ocampo, Ambeth R. "Pre-Spanish Filipinos Knew How to Write." Philippine Daily Inquirer 1999.

MLA (9th ed.) Citation

Ocampo, Ambeth R. "Pre-Spanish Filipinos Knew How to Write." Philippine Daily Inquirer, 1999.

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