Drof ,Richard C. <br/><br/>
Modern Control System / 

 - 12th ed. 
 - New Delhi :  Pearson,  2014. 
 - 1043 p. ;  25 cm. 
<br/><br/> Paperback. 
<br/><br/><label>ISBN: </label>978-93-325--1862-9 
<br/><br/><label>Dewey Class. No.: </label>629.83