DK essential manager's manualde Heller, RobertMateriasManagementHandbooks, manualsCommunication in managementDecision makingTime managementEdiciones (1)DK essential manager's manual (2008)Dorling Kindersley · inglés · ISBN 9781405328388Más obras de Heller, RobertTThe best of Robert HellerThe best of Robert Heller1989The business of business1981The business of success1982