Katigbak, T. (1998). Poor leadership becomes major economic concern. Philippine Star.
Citazione stile Chigago Style (17a edizione)Katigbak, Tony. "Poor Leadership Becomes Major Economic Concern." Philippine Star 1998.
Citatione MLA (9a ed.)Katigbak, Tony. "Poor Leadership Becomes Major Economic Concern." Philippine Star, 1998.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.