Umel, R. V. (2017). PNP probers can't find witnesses. IN Regions [column]. Philippine Daily Inquirer.
Citazione stile Chigago Style (17a edizione)Umel, Richel V. "PNP Probers Can't Find Witnesses. IN Regions [column]." Philippine Daily Inquirer 2017.
Citatione MLA (9a ed.)Umel, Richel V. "PNP Probers Can't Find Witnesses. IN Regions [column]." Philippine Daily Inquirer, 2017.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.