APA (7th ed.) Citation

Philippines & De Leon, H. S. (1991). The National Internal Revenue Code, annotated: P.D. no. 1158, as amended (4th ed.). Published & distributed by Rex Book Store.

Chicago Style (17th ed.) Citation

Philippines and Hector S. De Leon. The National Internal Revenue Code, Annotated: P.D. No. 1158, as Amended. 4th ed. Manila, Philippines: Published & distributed by Rex Book Store, 1991.

MLA (9th ed.) Citation

Philippines and Hector S. De Leon. The National Internal Revenue Code, Annotated: P.D. No. 1158, as Amended. 4th ed. Published & distributed by Rex Book Store, 1991.