APA (7th ed.) Citation

(1927). U.S. Government master specification for ribbons, computing and recording machine. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

U.S. Government Master Specification for Ribbons, Computing and Recording Machine. [Washington?]: U.S. Government Printing Office, 1927.

MLA (9th ed.) Citation

U.S. Government Master Specification for Ribbons, Computing and Recording Machine. U.S. Government Printing Office, 1927.