Cendaña, P. (1998). UP student council opposes CPDP. IN Letters [column]. Philippine Daily Inquirer.
Lua i Stíl Chicago (17ú heag.)Cendaña, Percival. "UP Student Council Opposes CPDP. IN Letters [column]." Philippine Daily Inquirer 1998.
Lua MLA (9ú heag.)Cendaña, Percival. "UP Student Council Opposes CPDP. IN Letters [column]." Philippine Daily Inquirer, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.