APA (7th ed.) Citation

Central Book Supply, Inc, & Philippines (Republic). (1970). National internal revenue code, as amended up to September 1969 (4th ed.). Central Book Supply.

Chicago Style (17th ed.) Citation

Central Book Supply, Inc, and Philippines (Republic). National Internal Revenue Code, as Amended Up to September 1969. 4th ed. Manila: Central Book Supply, 1970.

MLA (9th ed.) Citation

Central Book Supply, Inc, and Philippines (Republic). National Internal Revenue Code, as Amended Up to September 1969. 4th ed. Central Book Supply, 1970.