Umel, R. V. (2017). PNP probers can't find witnesses. IN Regions [column]. Philippine Daily Inquirer.
Chicago Style (17. basım) AtıfUmel, Richel V. "PNP Probers Can't Find Witnesses. IN Regions [column]." Philippine Daily Inquirer 2017.
MLA (9th ed.) AtıfUmel, Richel V. "PNP Probers Can't Find Witnesses. IN Regions [column]." Philippine Daily Inquirer, 2017.
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