Alfred Adler
Abraham H. Maslow
B.F. Skinner
Carl R. Rogers
Carl G Jung
Eric Fromm
Erik Erikson
Eric Berne
Ernest Becker
Fritz (Fredrick) Perls
Henry Murray
Karen Horney
Kirk Schneider
Nietzsche
Raymond B. Cattell
Rollo May
Sigmund Freud
Simone de Beauvoir