Porter, W. Thomas. <br/><br/>
EDP, controls and auditing / 
W. Thomas Porter, William E. Perry. 
 - 4th ed. 
 - Boston, Mass. :  Kent,  c1984. 
 - xvii, 571 p. :  ill. 
<br/><br/><label>ISBN: </label>0534030629 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic data processing departments--Auditing.
<br/><br/><label>Dewey Class. No.: </label>657.4502854