Gallardo, R. T. (1998). Ricky Davao soars to greater heights. Philippine Daily Inquirer.
Lua i Stíl Chicago (17ú heag.)Gallardo, Ricky T. "Ricky Davao Soars to Greater Heights." Philippine Daily Inquirer 1998.
Lua MLA (9ú heag.)Gallardo, Ricky T. "Ricky Davao Soars to Greater Heights." Philippine Daily Inquirer, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.