Valacich, Joseph S <br/><br/>
Essentials of Systems .... 

 - New Delhi:  PHI Learning:  2012. 
 - xxviii, 417  (R 11 SH 5) 
<br/><br/><label>ISBN: </label>9788120345584 
<br/><br/><label>Source: </label> Pak Book  PKR 887.40 
<br/><br/><label>Dewey Class. No.: </label>004.21