(1998). BIR Tax calendar: BIR enters the age of information technology. Bureau of Internal Revenue.
芝加哥风格引文BIR Tax Calendar: BIR Enters the Age of Information Technology. s.l: Bureau of Internal Revenue, 1998.
MLA引文BIR Tax Calendar: BIR Enters the Age of Information Technology. Bureau of Internal Revenue, 1998.
警告：这些引文格式不一定是100％准确.