(1998). BIR Tax calendar: BIR enters the age of information technology. Bureau of Internal Revenue.
Citación estilo ChicagoBIR Tax Calendar: BIR Enters the Age of Information Technology. s.l: Bureau of Internal Revenue, 1998.
Cita MLABIR Tax Calendar: BIR Enters the Age of Information Technology. Bureau of Internal Revenue, 1998.
Warning: These citations may not always be 100% accurate.