Whitmore, John,  Sir,  1937- <br/><br/>
Coaching for performance :  GROWing human potential and purpose : the principles and practice of coaching and leadership / 
John Whitmore. 
 - 3rd  ed. 
 - Boston :  Nicholas Brealey,  c2004. 
 - vi, 232 p. :  ill. ;  23 cm.