APA
Perls F. S., Perls F. S., . (1976). "The Gestalt approach" & "Eye witness to therapy". New York: Bantam Books.
Chicago
Perls Frederick S, Perls Frederick S, . 1976. "The Gestalt approach" & "Eye witness to therapy". New York: Bantam Books.
Harvard
Perls F. S., Perls F. S., . (1976). "The Gestalt approach" & "Eye witness to therapy". New York: Bantam Books.
MLA
Perls Frederick S, Perls Frederick S, . "The Gestalt approach" & "Eye witness to therapy". New York: Bantam Books. 1976.
