Ferm, V. (1969). Basic philosophy for beginners. The Christopher Publishing House.
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Chicago-čujuhus (17. p.)
Ferm, Vergilius. Basic Philosophy for Beginners. North Quincy, Mass.: The Christopher Publishing House, 1969.
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MLA-čujuhus (9. p.)
Ferm, Vergilius. Basic Philosophy for Beginners. The Christopher Publishing House, 1969.
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