Butler, J. D. (1968). Four philosophies and their practice in education and religion (Third edition.). Harper & Row, Publishers.
Citace podle Chicago (17th ed.)Butler, James Donald. Four Philosophies and Their Practice in Education and Religion. Third edition. New York: Harper & Row, Publishers, 1968.
Citace podle MLA (9th ed.)Butler, James Donald. Four Philosophies and Their Practice in Education and Religion. Third edition. Harper & Row, Publishers, 1968.
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