By Anthony D. Pellegrini (University of Minnesota, USA.), Frank Symons, John Hoch
By Elaine Cox, Tatiana Bachkirova, David Ashley Clutterbuck
By Michael J. A. Howe (University of Exeter)
By Maria Montessori
By Joshua Fletcher
By Sara Kuburic
By Alan Schwarz
By Windy Dryden, Andrew Reeves
By J. Reed, K. Byard, H. Fine
By Alexandra Massey
By Margaret Hough
By Stephen Palmer, Gladeana McMahon
By Jenifer Elton Wilson
By Christiane Sanderson
By Sofie Bager-Charleson
By David S. Derezotes
By David Edwards
By Gaby Shefler
By Debbie Daniels, Peter Jenkins, Jenkins, Peter
By Richard Bryant-Jefferies (Retired BACP Accredited Person-Centred Counsellor and Supervisor, UK)
By Philip E. Vernon
By Thomas J. Sweeney (Ohio University, USA)
By Phil Lapworth, Charlotte Sills, Sue Fish
By Christine Lister-Ford
By Phil Joyce, Charlotte Sills
By Alison Vaspe Nfaa, John Lees, Alison Vaspe
By Mick Cooper
By Peter Jenkins
By Rudi Dallos, Ros Draper