Javellana, J. L. (1999). Estrada, Ople, Villar to sign covenant Congress won't push political changes. Philippine Daily Inquirer.
Chicago Style aipamenaJavellana, Juliet Labog. "Estrada, Ople, Villar to Sign Covenant Congress Won't Push Political Changes." Philippine Daily Inquirer 1999.
MLA aipamenaJavellana, Juliet Labog. "Estrada, Ople, Villar to Sign Covenant Congress Won't Push Political Changes." Philippine Daily Inquirer, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.