Thorne, B. (2003). Carl Rogers. London : SAGE Pub.
Lua i Stíl Chicago (17ú heag.)Thorne, Brian. Carl Rogers. London : SAGE Pub, 2003.
Lua MLA (9ú heag.)Thorne, Brian. Carl Rogers. London : SAGE Pub, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.