Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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