Philippine News Agency. (2012). Duterte being groomed for top Customs post? Daily Tribune.
Čikaški stil citiranja (17. izdanje)Philippine News Agency. "Duterte Being Groomed for Top Customs Post?" Daily Tribune 2012.
MLA način citiranja (9. izdanje)Philippine News Agency. "Duterte Being Groomed for Top Customs Post?" Daily Tribune, 2012.
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