APA (7th ed.) Citation

De Leon, H. S., & De Leon, H. M. (2011). The National Internal Revenue Code annotated: (P.D. No. 1158, as amended up to R.A. No. 10021) (10th ed.). Rex Book Store.

Chicago Style (17th ed.) Citation

De Leon, Hector S., and Hector M. De Leon. The National Internal Revenue Code Annotated: (P.D. No. 1158, as Amended Up to R.A. No. 10021). 10th ed. Manila: Rex Book Store, 2011.

MLA (9th ed.) Citation

De Leon, Hector S., and Hector M. De Leon. The National Internal Revenue Code Annotated: (P.D. No. 1158, as Amended Up to R.A. No. 10021). 10th ed. Rex Book Store, 2011.