APA (7th ed.) Citation

United States. (1990). The complete Internal Revenue Code. Callaghan & Co..

Chicago Style (17th ed.) Citation

United States. The Complete Internal Revenue Code. Deerfield, Ill.: Callaghan & Co., 1990.

MLA (9th ed.) Citation

United States. The Complete Internal Revenue Code. Callaghan & Co., 1990.

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