Fisher, Roger Getting to yes : negotiating agreement without giving in / Roger Fisher and William Ury edited by Bruce Patton - New York : Random House Business Books, c2011. - xxvii, 204 p. : 20 cm. ISBN: 9781847940933 LCCN: Subjects--Topical Terms: Negotiation LC Class. No.: BF637 / .N4F57 2011