Não informado. (1894). Contributions to philosophy, psychology and education. Columbia University.
Lua i Stíl Chicago (17ú heag.)Não informado. Contributions to Philosophy, Psychology and Education. New York: Columbia University, 1894.
Lua MLA (8ú heag.)Não informado. Contributions to Philosophy, Psychology and Education. Columbia University, 1894.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.