The Bass handbook of leadership : theory research and managerial applications For thirty three years and through three editions Bass & Stogdills Handbook of Leadership has been the indispensable bible for every serious student of leadership. This completely revised and updated fourth edition reflects the growth and changes in the study of leadership over the past seventeen years with new chapters on transformational leadership ethics presidential leadership and executive leadership. Throughout the Handbook the contributions from cognitive social psychology and the social political communications and administrative sciences have been expanded.