Philippines. Bureau of Internal Revenue & Career Development Center. (2005). B.I.R revenue regulations: January 1-June 30, 2005. Career Development Center.
Chicago-Zitierstil (17. Ausg.)Philippines. Bureau of Internal Revenue und Career Development Center. B.I.R Revenue Regulations: January 1-June 30, 2005. [Quezon City: Career Development Center, 2005.
MLA-Zitierstil (9. Ausg.)Philippines. Bureau of Internal Revenue und Career Development Center. B.I.R Revenue Regulations: January 1-June 30, 2005. Career Development Center, 2005.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.