Katigbak, T. (1998). Economist proposes steps to spur economy. Philippine Star.
Chicago Style aipamenaKatigbak, Tony. "Economist Proposes Steps to Spur Economy." Philippine Star 1998.
MLA aipamenaKatigbak, Tony. "Economist Proposes Steps to Spur Economy." Philippine Star, 1998.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.