Não informado. (1953). British Journal of Statistical Psychology. British Psychological Society.
Lua i Stíl Chicago (17ú heag.)Não informado. British Journal of Statistical Psychology. London: British Psychological Society, 1953.
Lua MLA (8ú heag.)Não informado. British Journal of Statistical Psychology. British Psychological Society, 1953.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.