(1974). Man and his personal freedom ; Responsibility and creativity in art anf literature ; Problems of determinism ; The future of philosophy. Sofia Pr..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMan and His Personal Freedom ; Responsibility and Creativity in Art Anf Literature ; Problems of Determinism ; The Future of Philosophy. Sofia: Sofia Pr., 1974.
एमएलए (8वां संस्करण) प्रशस्ति पत्रMan and His Personal Freedom ; Responsibility and Creativity in Art Anf Literature ; Problems of Determinism ; The Future of Philosophy. Sofia Pr., 1974.
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