MLA

Acarnley, Paul. Stepping Motors : a Guide to Theory and Practice. 4th ed. London: Institution of Engineering and Technology, 2007.

APA

Acarnley, P. (2007). Stepping motors : a guide to theory and practice. 4th ed. London: Institution of Engineering and Technology.

Chicago

Acarnley, Paul, Stepping Motors: A Guide to Theory and Practice. 4th ed. London: Institution of Engineering and Technology, 2007.