Haag, Stephen. <br/><br/>
Information systems essentials / 

 - Boston   McGraw-Hill,  2006. 
 - xxx, 462 p. :  ill. ;  28 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0073105813 0071117148  
<br/><br/><label>LC Class. No.: </label>HF5548.5  / .H11 2006