Fisher, Roger. <br/><br/>
Getting to yes :  negotiating agreement without giving in / 
Roger Fisher and William Ury. 
 - Random House Group :  London,  1991. 
 - xv, 207 p. :  20 cm. 
<br/><br/><label>ISBN: </label>9781844131464 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Negotiation.