APA aipamena

(1998). BIR Tax calendar: BIR enters the age of information technology. Bureau of Internal Revenue.

Chicago Style aipamena

BIR Tax Calendar: BIR Enters the Age of Information Technology. s.l: Bureau of Internal Revenue, 1998.

MLA aipamena

BIR Tax Calendar: BIR Enters the Age of Information Technology. Bureau of Internal Revenue, 1998.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.