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