APA (7th ed.) Citation
Hildegard, S., Baird, J. L., & Ehrman, R. K. (1998). The letters of Hildegard of Bingen. Oxford University Press.
Chicago Style (17th ed.) Citation
Hildegard, Saint, Joseph L. Baird, and Radd K. Ehrman. The Letters of Hildegard of Bingen. New York: Oxford University Press, 1998.
MLA (9th ed.) Citation
Hildegard, Saint, et al. The Letters of Hildegard of Bingen. Oxford University Press, 1998.
Warning: These citations may not always be 100% accurate.