APA (7th ed.) Citation

Philippines. Laws, statutes, etc. (1979). National internal revenue code of the Philippines. National Book Store.

Chicago Style (17th ed.) Citation

Philippines. Laws, statutes, etc. National Internal Revenue Code of the Philippines. [Manila]: National Book Store, 1979.

MLA (9th ed.) Citation

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

Warning: These citations may not always be 100% accurate.