APA (7th ed.) Citation

(1926). U.S. Government master specification for refractories, fire clay, plastic. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

U.S. Government Master Specification for Refractories, Fire Clay, Plastic. [Washington?]: U.S. Government Printing Office, 1926.

MLA (9th ed.) Citation

U.S. Government Master Specification for Refractories, Fire Clay, Plastic. U.S. Government Printing Office, 1926.