APA-čujuhus (7. p.)
Hill, T. E. (1961). Contemporary theories of knowledge (ed.). Ronald Press Co..
Chicago-čujuhus (17. p.)
Hill, Thomas English. Contemporary Theories of Knowledge. ed. New York: Ronald Press Co., 1961.
MLA-čujuhus (9. p.)
Hill, Thomas English. Contemporary Theories of Knowledge. ed. Ronald Press Co., 1961.
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