APA-referens (7:e uppl.)

Clarkson, P. (1999). Gestalt counselling in action (2nd ed.). Sage.

Chicago-referens (17:e uppl.)

Clarkson, Petruska. Gestalt Counselling in Action. 2nd ed. London: Sage, 1999.

MLA-referens (9:e uppl.)

Clarkson, Petruska. Gestalt Counselling in Action. 2nd ed. Sage, 1999.