Haag, Stephen <br/><br/>
Information Systems Essentials 
Stephen Haag and Maeve Cummings 
 - Boston  McGraw-Hill Irwin  2009 
 - xxix, 429p. 
<br/><br/> Inlc. indexes 
<br/><br/><label>ISBN: </label>9780071285490 
<br/><br/><label>LC Class. No.: </label>T 58.6  / .H3C8 2009