Hildegard, S., Baird, J. L., & Ehrman, R. K. (1998). The letters of Hildegard of Bingen. Oxford University Press.
Dyfyniad Arddull ChicagoHildegard, Saint, Joseph L. Baird, and Radd K. Ehrman. The Letters of Hildegard of Bingen. New York ; Oxford: Oxford University Press, 1998.
Dyfyniad MLAHildegard, Saint, et al. The Letters of Hildegard of Bingen. Oxford University Press, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.