Não informado. (1963). Educational psychologist. American Psychological Association.
Lua i Stíl Chicago (17ú heag.)Não informado. Educational Psychologist. Hillsdale, NJ: American Psychological Association, 1963.
Lua MLA (8ú heag.)Não informado. Educational Psychologist. American Psychological Association, 1963.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.