Castaño, J. E. I. (1999). Ivantans recall the day a strong quake ruined their 81 years ago. Philippine Star.
Lua i Stíl Chicago (17ú heag.)Castaño, Jack E. III. "Ivantans Recall the Day a Strong Quake Ruined Their 81 Years Ago." Philippine Star 1999.
Lua MLA (9ú heag.)Castaño, Jack E. III. "Ivantans Recall the Day a Strong Quake Ruined Their 81 Years Ago." Philippine Star, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.