Sapnu, R. (1999). Pinay calendar genius wants to wake it to Guiness Book. Philippine Star.
Lua i Stíl Chicago (17ú heag.)Sapnu, Ric. "Pinay Calendar Genius Wants to Wake It to Guiness Book." Philippine Star 1999.
Lua MLA (9ú heag.)Sapnu, Ric. "Pinay Calendar Genius Wants to Wake It to Guiness Book." Philippine Star, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.