Philippines. Laws, statutes, etc, & Pinpin, F. D. (1976). The national internal revenue code revised and codified: As amended by P.D. No. 69 and other presidential decrees up to P.D. No. 874 with related decrees and regulations (6th ed.). Cacho Hermanos.
Cita Chicago (17th ed.)Philippines. Laws, statutes, etc, i Felipe D. Pinpin. The National Internal Revenue Code Revised and Codified: As Amended by P.D. No. 69 and Other Presidential Decrees Up to P.D. No. 874 with Related Decrees and Regulations. 6th ed. Mandaluyong, Rizal: Cacho Hermanos, 1976.
Cita MLA (9th ed.)Philippines. Laws, statutes, etc, i Felipe D. Pinpin. The National Internal Revenue Code Revised and Codified: As Amended by P.D. No. 69 and Other Presidential Decrees Up to P.D. No. 874 with Related Decrees and Regulations. 6th ed. Cacho Hermanos, 1976.