Lua APA (7ú heag.)

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

Lua i Stíl Chicago (17ú heag.)

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

Lua MLA (9ú heag.)

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

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.