APA (7th ed.) Citation

Philippines, De Leon, H. S., & De Leon, H. M. J. The National Internal Revenue Code annotated: P.D. no. 1158, as amended up to R.A. No. 9224 (Eight edition.).

Chicago Style (17th ed.) Citation

Philippines, Hector S. De Leon, and Hector M. Jr De Leon. The National Internal Revenue Code Annotated: P.D. No. 1158, as Amended Up to R.A. No. 9224. Eight edition.

MLA (9th ed.) Citation

Philippines, et al. The National Internal Revenue Code Annotated: P.D. No. 1158, as Amended Up to R.A. No. 9224. Eight edition.