GMAT official guide 2018 : book + online 

 - Great Britain  John Wiley & Sons  2017 
 - v,846p.,ill.col.:27.5cm. 
<br/><br/> Includes: Appendex 
<br/><br/><label>ISBN: </label>978-1-119-38747-3 
<br/><br/><label>Dewey Class. No.: </label>650.076 GMA