Bulgarian Academy of Sciences Institute of philosophy & Buchrarov, M. (1973). Eleven centuries of Bulgerian philosophical thought. Publishing House of the Bulgerian Academy of Sciences.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিBulgarian Academy of Sciences Institute of philosophy এবং M. Buchrarov. Eleven Centuries of Bulgerian Philosophical Thought. Publishing House of the Bulgerian Academy of Sciences, 1973.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিBulgarian Academy of Sciences Institute of philosophy এবং M. Buchrarov. Eleven Centuries of Bulgerian Philosophical Thought. Publishing House of the Bulgerian Academy of Sciences, 1973.
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