Ultan, L. (1977). Workbook/anthology for music theory: Problems and practices in the Middle Ages and Renaissance. University of Minnesota Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUltan, Lloyd. Workbook/anthology for Music Theory: Problems and Practices in the Middle Ages and Renaissance. Minneapolis: University of Minnesota Press, 1977.
एमएलए (9वां संस्करण) प्रशस्ति पत्रUltan, Lloyd. Workbook/anthology for Music Theory: Problems and Practices in the Middle Ages and Renaissance. University of Minnesota Press, 1977.
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