Heinritz S F <br/><br/>
Purchasing: principles and applications 
Heinritz S F; Farrell P V And Others 
 - 7 
 - New Jersey  New Jersey, Prentice-Hall  1986 
 - 404p 
<br/><br/><label>ISBN: </label>0-13-742180-x 
<br/><br/><label>Source: </label>Textbook