Hildegard, S., Baird, J. L., & Ehrman, R. K. (1998). The letters of Hildegard of Bingen. Oxford University Press.
芝加哥风格引文Hildegard, Saint, Joseph L. Baird, 与 Radd K. Ehrman. The Letters of Hildegard of Bingen. New York ; Oxford: Oxford University Press, 1998.
MLA引文Hildegard, Saint, et al. The Letters of Hildegard of Bingen. Oxford University Press, 1998.
警告：这些引文格式不一定是100％准确.