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