Erl, Thomas. <br/><br/>
Soa :  principles of service design / 
Thomas Erl. 
 - New Delhi :  Pearson Education,  2008. 
 - xxxii,540 p. ;  (R 15 SH 3) 
<br/><br/><label>ISBN: </label>0132344823 (hardcover) 9780132344821 (hardcover) 
<br/><br/><label>Publisher. No.: </label>978-0-1323-4482-1  Prentice Hall 
<br/><br/><label>Source: </label> Pak Book  PKR 945.00 
<br/><br/><label>Dewey Class. No.: </label>004.22