APA (7th ed.) Citation

United States. National Screw Thread Commission. (1928). Tap drill sizes. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. National Screw Thread Commission. Tap Drill Sizes. [Washington]: [publisher not identified], 1928.

MLA (9th ed.) Citation

United States. National Screw Thread Commission. Tap Drill Sizes. [publisher not identified], 1928.

Warning: These citations may not always be 100% accurate.