Katigbak, T. (1998). Poor leadership becomes major economic concern. Philippine Star.
Chicago-referens (17:e uppl.)Katigbak, Tony. "Poor Leadership Becomes Major Economic Concern." Philippine Star 1998.
MLA-referens (9:e uppl.)Katigbak, Tony. "Poor Leadership Becomes Major Economic Concern." Philippine Star, 1998.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.