Purchasing and supply menagement 
Michael R. Leenders. [et. al]. 
 - 12th ed. 
 - New Delhi  McGraw  [n. d.] 
 - xxi, 743p., 24cm. 
<br/><br/><label>ISBN: </label>0-07-237060-2. 
<br/><br/><label>Dewey Class. No.: </label>658.72  / P94P