Style de citation APA (7e éd.)

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

Style de citation Chicago (17e éd.)

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

Style de citation MLA (9e éd.)

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