administracao appliedpsychology business conflict(psychology) conflictmanagement développementd'aptitudes interpersonalekommunikation interpersonalrelations managementdevelopment manuals negociofiduciario negotiating negotiation negotiationinbusiness nonfiction négociation négociations onderhandelen psychologicalconflict psychologiedutravail réunions sozialerkonsens verhandlung verhandlungstechnik