Cita APA (7th ed.)

Philippines. Bureau of Internal Revenue & Career Development Center. (2004). Complete 2003 B.I.R revenue regulations. CDC.

Cita Chicago (17th ed.)

Philippines. Bureau of Internal Revenue i Career Development Center. Complete 2003 B.I.R Revenue Regulations. Quezon City: CDC, 2004.

Cita MLA (9th ed.)

Philippines. Bureau of Internal Revenue i Career Development Center. Complete 2003 B.I.R Revenue Regulations. CDC, 2004.