Pore, L. (1999). BIR plans electronic filing of tax returns. Manila Times.
Chicago Style aipamenaPore, Lyra. "BIR Plans Electronic Filing of Tax Returns." Manila Times 1999.
MLA aipamenaPore, Lyra. "BIR Plans Electronic Filing of Tax Returns." Manila Times, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.