Lipschutz, Martin M. & Lipschutz, Seymour <br/><br/>
Schaum's outline of theory and problems of data processing 

 - McGraw - Hill, Singapore 
 - 218 
<br/><br/><label>ISBN: </label>0-07-99032-8 
<br/><br/><label>Dewey Class. No.: </label>001.6 Lip