APA (7th ed.) Citation

(1927). Instrument and watch screws and screw threads. [publisher not identified].

Chicago Style (17th ed.) Citation

Instrument and Watch Screws and Screw Threads. Washington, D.C.: [publisher not identified], 1927.

MLA (9th ed.) Citation

Instrument and Watch Screws and Screw Threads. [publisher not identified], 1927.

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