PPrincipled negotiation, a working guidePrincipled negotiation, a working guidede Roger FisherEdiciones (1)Principled negotiation, a working guide (1979)Harvard Negotiation Project · inglésMás obras de Roger FisherEEssays on interventionEssays on interventionLi xing zhi wai de tan panIInternational mediation, a working guideInternational mediation, a working guide