Philippines. Laws, statutes, etc, & De Leon, H. S. (1975). The national internal revenue code annotated: As amended up to Pres. Decree No. 820. National Book Store.
Chicago Style (17th ed.) CitationPhilippines. Laws, statutes, etc, and Hector S. De Leon. The National Internal Revenue Code Annotated: As Amended Up to Pres. Decree No. 820. Manila: National Book Store, 1975.
MLA (9th ed.) CitationPhilippines. Laws, statutes, etc, and Hector S. De Leon. The National Internal Revenue Code Annotated: As Amended Up to Pres. Decree No. 820. National Book Store, 1975.
Warning: These citations may not always be 100% accurate.