APA (7th ed.) Citation

United States. Bureau of Standards. (1925). National directory of commodity specifications: Classified and alphabetical lists and brief descriptions of existing commodity specifications. GPO.

Chicago Style (17th ed.) Citation

United States. Bureau of Standards. National Directory of Commodity Specifications: Classified and Alphabetical Lists and Brief Descriptions of Existing Commodity Specifications. [Washington]: GPO, 1925.

MLA (9th ed.) Citation

United States. Bureau of Standards. National Directory of Commodity Specifications: Classified and Alphabetical Lists and Brief Descriptions of Existing Commodity Specifications. GPO, 1925.