APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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