APA (7th ed.) Citation

(1921). Regulations 45 (1920 edition) relating to income tax and war profits and excess profits tax under Revenue Act of 1918, promulgated Jan. 28, 1921. GPO.

Chicago Style (17th ed.) Citation

Regulations 45 (1920 Edition) Relating to Income Tax and War Profits and Excess Profits Tax Under Revenue Act of 1918, Promulgated Jan. 28, 1921. [Washington]: GPO, 1921.

MLA (9th ed.) Citation

Regulations 45 (1920 Edition) Relating to Income Tax and War Profits and Excess Profits Tax Under Revenue Act of 1918, Promulgated Jan. 28, 1921. GPO, 1921.