KOTTLER, J. A., & BLAU, D. S. (1989). The imperfect therapist. Jossey-Bass.
Lua i Stíl Chicago (17ú heag.)KOTTLER, Jeffrey A., agus Diane S. BLAU. The Imperfect Therapist. San Fransisco: Jossey-Bass, 1989.
Lua MLA (9ú heag.)KOTTLER, Jeffrey A., agus Diane S. BLAU. The Imperfect Therapist. Jossey-Bass, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.