Plato,  . <br/><br/>
The Republic /  
translated by Desmond Lee. 
 - Second  Rev.Ed. /  
 - England :   Penguin Books Ltd.. 
 - p.468 :  
<br/><br/><label>ISBN: </label>0-14-044.048-8 
<br/><br/><label>Dewey Class. No.: </label>O111,6C427:g  / L4;12