Citazione Stile APA (7a Edizione)

Perls, F. S., & Perls, F. S. (1973). The gestalt approach & Eye witness to therapy. Bantam Books.

Citazione stile Chigago Style (17a edizione)

Perls, Frederick S., e Frederick S. Perls. The Gestalt Approach & Eye Witness to Therapy. New York: Bantam Books, 1973.

Citatione MLA (9a ed.)

Perls, Frederick S., e Frederick S. Perls. The Gestalt Approach & Eye Witness to Therapy. Bantam Books, 1973.