Não informado. (1894). Contributions to philosophy, psychology and education. Columbia University.
Chicago-viite (17. p.)Não informado. Contributions to Philosophy, Psychology and Education. New York: Columbia University, 1894.
MLA-viite (8. p.)Não informado. Contributions to Philosophy, Psychology and Education. Columbia University, 1894.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.