Bulgarian Academy of Sciences Institute of philosophy & Buchrarov, M. (1973). Eleven centuries of Bulgerian philosophical thought. Publishing House of the Bulgerian Academy of Sciences.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBulgarian Academy of Sciences Institute of philosophy और M. Buchrarov. Eleven Centuries of Bulgerian Philosophical Thought. Publishing House of the Bulgerian Academy of Sciences, 1973.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBulgarian Academy of Sciences Institute of philosophy और M. Buchrarov. Eleven Centuries of Bulgerian Philosophical Thought. Publishing House of the Bulgerian Academy of Sciences, 1973.
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