Scheffler, I. (1900). Conditions of knowledge: And introduction to epistemology and education. Scott Foresman.
Citace podle Chicago (17th ed.)Scheffler, Israel. Conditions of Knowledge: And Introduction to Epistemology and Education. Glenview: Scott Foresman, 1900.
Citace podle MLA (9th ed.)Scheffler, Israel. Conditions of Knowledge: And Introduction to Epistemology and Education. Scott Foresman, 1900.
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