Lacuarta, G. G. (2000). BIR forms now on Internet: Www:bir.gov.ph. Philippine Daily Inquirer.
Chicago Style aipamenaLacuarta, Gerald G. "BIR Forms Now on Internet: Www:bir.gov.ph." Philippine Daily Inquirer 2000.
MLA aipamenaLacuarta, Gerald G. "BIR Forms Now on Internet: Www:bir.gov.ph." Philippine Daily Inquirer, 2000.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.