APA (7th ed.) Citation

Philippines. Laws, statutes, etc, Nolledo, J. N., & Nolledo, M. S. (1979). The national internal revenue code of the Philippines. National Book Store.

Chicago Style (17th ed.) Citation

Philippines. Laws, statutes, etc, Jose N. Nolledo, and Mercedita Santiago Nolledo. The National Internal Revenue Code of the Philippines. Manila: National Book Store, 1979.

MLA (9th ed.) Citation

Philippines. Laws, statutes, etc, et al. The National Internal Revenue Code of the Philippines. National Book Store, 1979.