APA (7th ed.) Citation

Herrera, C. (1997). Valenzuela still most polluted area. Philippine Daily Inquirer.

Chicago Style (17th ed.) Citation

Herrera, Christine. "Valenzuela Still Most Polluted Area." Philippine Daily Inquirer 1997.

MLA (9th ed.) Citation

Herrera, Christine. "Valenzuela Still Most Polluted Area." Philippine Daily Inquirer, 1997.

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