Armstrong, M., (1998), (2001), (2004), Performance Management, The new realities, A handbook of human management practices, managing performance management in action, CIPD London.
Davis R (1995), Choosing Performance Management, holistic approach journal, Cupa publication, Delhi.
Edward, M., R., Ewen, (1996), “360 degree feedback” the powerful new model for assessment and performance improvement. New York