Catipon, E. (1999). Oh Christmas trees, oh Christmas trees! Philippine Star.
Lua i Stíl Chicago (17ú heag.)Catipon, Eric. "Oh Christmas Trees, Oh Christmas Trees!" Philippine Star 1999.
Lua MLA (9ú heag.)Catipon, Eric. "Oh Christmas Trees, Oh Christmas Trees!" Philippine Star, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.