APA (7th ed.) Citation

Perls, F. S., Hefferline, R. F., & Goodman, P. (1951). Gestalt therapy: Excitement and growth in the human personality. Penguin Books.

Chicago Style (17th ed.) Citation

Perls, Frederick S., Ralph F. Hefferline, and Paul Goodman. Gestalt Therapy: Excitement and Growth in the Human Personality. [s.l.]: Penguin Books, 1951.

MLA (9th ed.) Citation

Perls, Frederick S., et al. Gestalt Therapy: Excitement and Growth in the Human Personality. Penguin Books, 1951.