APA (7th ed.) Citation

Research Institute of America, inc, West Group, & Mertens, J. (1970). The Complete internal revenue code. Research Institute of America.

Chicago Style (17th ed.) Citation

Research Institute of America, inc, West Group, and Jacob Mertens. The Complete Internal Revenue Code. New York: Research Institute of America, 1970.

MLA (8th ed.) Citation

Research Institute of America, inc, et al. The Complete Internal Revenue Code. Research Institute of America, 1970.