Não informado. (1894). Contributions to philosophy, psychology and education. Columbia University.
Chicago-Zitierstil (17. Ausg.)Não informado. Contributions to Philosophy, Psychology and Education. New York: Columbia University, 1894.
MLA-Zitierstil (8. Ausg.)Não informado. Contributions to Philosophy, Psychology and Education. Columbia University, 1894.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.