Sapnu, R. (1999). Pinay calendar genius wants to wake it to Guiness Book. Philippine Star.
Chicago-referens (17:e uppl.)Sapnu, Ric. "Pinay Calendar Genius Wants to Wake It to Guiness Book." Philippine Star 1999.
MLA-referens (9:e uppl.)Sapnu, Ric. "Pinay Calendar Genius Wants to Wake It to Guiness Book." Philippine Star, 1999.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.