Alarilla, J. G. (2000). Pop quiz, hotshot: Who was 1st to offer free e-mail in RP. Philippine Daily Inquirer.
Lua i Stíl Chicago (17ú heag.)Alarilla, Joey G. "Pop Quiz, Hotshot: Who Was 1st to Offer Free E-mail in RP." Philippine Daily Inquirer 2000.
Lua MLA (9ú heag.)Alarilla, Joey G. "Pop Quiz, Hotshot: Who Was 1st to Offer Free E-mail in RP." Philippine Daily Inquirer, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.