O’Brien, James A. <br/><br/>
Introduction to Information System 
by James A. O’Brien 
 - 7th ed. 
 - Burr Ridge, Illinois  Richard D. Irwin, Inc.  1994 
 - xxii, 510 pages; 26 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0-256-11884-1 
<br/><br/><label>Dewey Class. No.: </label>658.05/Ob6