Crisostomo, I. T. (2001). Dr. Pio Valenzuela's last KKK mission. Philippine Star.
Lua i Stíl Chicago (17ú heag.)Crisostomo, Isabelo T. "Dr. Pio Valenzuela's Last KKK Mission." Philippine Star 2001.
Lua MLA (9ú heag.)Crisostomo, Isabelo T. "Dr. Pio Valenzuela's Last KKK Mission." Philippine Star, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.