Porter, W. Thomas <br/><br/>
EDP :  control and auditing / 
W. Thomas Porter and William E. Perry 
 - 4th ed. 
 - Boston :  Kent Publishing Co.,  1984 
 - 571 p. :  ill.;  24 cm. 
<br/><br/><label>ISBN: </label>0534030629 
<br/><br/><label>LCCN: </label>83-25540 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic data processing departments--Auditing