APA (7th ed.) Citation

(1925). U.S. Government master specification for black waterproof drawing ink. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

U.S. Government Master Specification for Black Waterproof Drawing Ink. [Washington?]: U.S. Government Printing Office, 1925.

MLA (9th ed.) Citation

U.S. Government Master Specification for Black Waterproof Drawing Ink. U.S. Government Printing Office, 1925.