International encyclopedia of careers and vocationals guidance : vol. 2 .-12th ed .-81-7649-646-4 

 - Viva Books Private Limited, New Delhi  2004 
 - vi,858 
<br/><br/><label>ISBN: </label>81-7649-646-4 
<br/><br/><label>Dewey Class. No.: </label>R371.42503 I.E.C.V.G.