By Carl R. Rogers
By Carl R. Rogers, Howard Kirschenbaum, Valerie L. Henderson
By Carl R. Rogers, Barry Stevens, Eugene T. Gendlin, John M. Shlien, Wilson Van Dusen
By Rogers, Carl, Blyton, Enid, Maidment, Stella, Cooper, Mary, Carl R. Rogers
By Carl R. Rogers, H. Jerome Freiberg (both of University of Houston, Texas, USA)
By Rogers, Carl, Fuchs, Frances, Carl R. Rogers