Bibliography of the sources which Merton consulted during the writing of Journal #10, "The Red Diary," which have been conclusively identified.
- A Friend of God (14th Century). The Book of the Poor in Spirit. Edited by C.F. Kelley. New York, Harper & Brothers, 1954.
- Bars, Henry. Maritain en Notre Temps. Paris, Editions Bernard Grasset, 1959.
- Basetti-Sani, Giulio. Mohammed et Saint Francois. Ottawa, Commissariat De TerreSainte, 1959.
- Frankl, Victor E. From Death Camp to Existentialism. Boston, Beacon Press, 1959.
- Heschel, Abraham J. Between God and Man. Edited by Fritz A. Rothschild. Toronto, Collier Macmillan, 1959.
- Kadloubovsky, E. and Palmer, G.E.H., translators. Early Fathers from the Philokalia. London, Faber & Faber, Ltd., 1953.
- Scholem, Gershom G. Major Trends in Jewish Mysticism. New York, Schocken Books, Inc., 1946.
- Sofrony, Archimandrite. The Undistorted Image. Translated by Rosemary Edmunds. London, The Faith Press, 1958.