Não informado. (1894). Contributions to philosophy, psychology and education. Columbia University.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Contributions to Philosophy, Psychology and Education. New York: Columbia University, 1894.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Contributions to Philosophy, Psychology and Education. Columbia University, 1894.
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