(1973). Reason and action in the transformation of the world ; Philosophy in the process of the scientific and technological revolution ; Knowledge and values in the scientific and technological era ; Structure and methods of contemporary scientific knowledge. Sofia Pr..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रReason and Action in the Transformation of the World ; Philosophy in the Process of the Scientific and Technological Revolution ; Knowledge and Values in the Scientific and Technological Era ; Structure and Methods of Contemporary Scientific Knowledge. Sofia: Sofia Pr., 1973.
एमएलए (8वां संस्करण) प्रशस्ति पत्रReason and Action in the Transformation of the World ; Philosophy in the Process of the Scientific and Technological Revolution ; Knowledge and Values in the Scientific and Technological Era ; Structure and Methods of Contemporary Scientific Knowledge. Sofia Pr., 1973.