London Centre for Psychotherapy, ebrary, Inc, & Bishop, B. (2002). Challenges to practice. Karnac.
Lua i Stíl Chicago (17ú heag.)London Centre for Psychotherapy, Inc ebrary, agus Bernardine Bishop. Challenges to Practice. London ; New York: Karnac, 2002.
Lua MLA (9ú heag.)London Centre for Psychotherapy, et al. Challenges to Practice. Karnac, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.