Philippines. Bureau of Internal Revenue. (1999). Complete 1999 B.I.R. revenue regulations. Career Development Center.
Chicago Style (17th ed.) CitationPhilippines. Bureau of Internal Revenue. Complete 1999 B.I.R. Revenue Regulations. Quezon City: Career Development Center, 1999.
MLA (9th ed.) CitationPhilippines. Bureau of Internal Revenue. Complete 1999 B.I.R. Revenue Regulations. Career Development Center, 1999.
Warning: These citations may not always be 100% accurate.