Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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