APA (7th ed.) Citation

Watts, J. L. (1970). Electrical control devices ([1st ed.].). Machinery Publishing.

Chicago Style (17th ed.) Citation

Watts, J. L. Electrical Control Devices. [1st ed.]. London: Machinery Publishing, 1970.

MLA (9th ed.) Citation

Watts, J. L. Electrical Control Devices. [1st ed.]. Machinery Publishing, 1970.