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.