Abrera Jess. (2012). Worsening air pollution. Philippine Daily Inquirer.
Cita Chicago (17th ed.)Abrera Jess. "Worsening Air Pollution." Philippine Daily Inquirer 2012.
Cita MLA (9th ed.)Abrera Jess. "Worsening Air Pollution." Philippine Daily Inquirer, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.