Philippine News Agency. (2012). Duterte being groomed for top Customs post? Daily Tribune.
Cita Chicago (17th ed.)Philippine News Agency. "Duterte Being Groomed for Top Customs Post?" Daily Tribune 2012.
Cita MLA (9th ed.)Philippine News Agency. "Duterte Being Groomed for Top Customs Post?" Daily Tribune, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.