Philippine Center for Investigative Journalism. (2016). Pre-campaign ads hit P6.7B. Manila Bulletin.
Chicago Style (17. basım) AtıfPhilippine Center for Investigative Journalism. "Pre-campaign Ads Hit P6.7B." Manila Bulletin 2016.
MLA (9th ed.) AtıfPhilippine Center for Investigative Journalism. "Pre-campaign Ads Hit P6.7B." Manila Bulletin, 2016.
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