Ultan, L. (1977). Workbook/anthology for music theory: Problems and practices in the Middle Ages and Renaissance. University of Minnesota Press.
Lua i Stíl Chicago (17ú heag.)Ultan, Lloyd. Workbook/anthology for Music Theory: Problems and Practices in the Middle Ages and Renaissance. Minneapolis: University of Minnesota Press, 1977.
Lua MLA (9ú heag.)Ultan, Lloyd. Workbook/anthology for Music Theory: Problems and Practices in the Middle Ages and Renaissance. University of Minnesota Press, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.