Calleja, D. . O. (1997). Bus falls into ravine in Bicol; 19 killed. Philippine Daily Inquirer.
Lua i Stíl Chicago (17ú heag.)Calleja, Danny O. "Bus Falls into Ravine in Bicol; 19 Killed." Philippine Daily Inquirer 1997.
Lua MLA (9ú heag.)Calleja, Danny O. "Bus Falls into Ravine in Bicol; 19 Killed." Philippine Daily Inquirer, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.