Haag, Stephen. <br/><br/>
Information Systems Essentials / 
Stephen Haag; Meave Cummings. 
 - 3rd ed. 
 - New York :  Mc Graw Hill ,  2009. 
 - 429p. :  ill ;  26 cm. 
<br/><br/><label>ISBN: </label>9780071285490 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Information Systems.
<br/><br/><label>LC Class. No.: </label>T58.6  / .H337 2009.