Cita APA (7th ed.)

Casayuran, M. B. (2019). 9 out of 10 people worldwide breathe polluted air -WHO. Manila Bulletin.

Cita Chicago (17th ed.)

Casayuran, Mario B. "9 Out of 10 People Worldwide Breathe Polluted Air -WHO." Manila Bulletin 2019.

Cita MLA (9th ed.)

Casayuran, Mario B. "9 Out of 10 People Worldwide Breathe Polluted Air -WHO." Manila Bulletin, 2019.