Nagrath, I. J. and Kothari, D. P. <br/><br/>
Electric Machines 

 - 2nd ed. 
 -  Tata McGraw-Hill Publishing Company Ltd., New Delhi  1997 
 - xxii, 778 
<br/><br/><label>ISBN: </label>007463258X 
<br/><br/><label>Dewey Class. No.: </label>Column-31