Katigbak, T. (1998). Gov't slow action on BOT infra project turns off investors. Philippine Star.
Lua i Stíl Chicago (17ú heag.)Katigbak, Tony. "Gov't Slow Action on BOT Infra Project Turns off Investors." Philippine Star 1998.
Lua MLA (9ú heag.)Katigbak, Tony. "Gov't Slow Action on BOT Infra Project Turns off Investors." Philippine Star, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.