Cita APA

Hildegard, S., Baird, J. L., & Ehrman, R. K. (1998). The letters of Hildegard of Bingen. Oxford University Press.

Citación estilo Chicago

Hildegard, Saint, Joseph L. Baird, and Radd K. Ehrman. The Letters of Hildegard of Bingen. New York ; Oxford: Oxford University Press, 1998.

Cita MLA

Hildegard, Saint, et al. The Letters of Hildegard of Bingen. Oxford University Press, 1998.