Colledge, Edmund (1981). "Historical Data". Meister Eckhart: The Essential Sermons, Commentaries, Treatises, and Defense. Colledge, Edmund., McGinn, Bernard. New York: Paulist Press. p. 12. ISBN0-8091-0322-2. OCLC8410552.
Eckhart, Meister (1980). Breakthrough, Meister Eckhart's creation spirituality, in new translation. Translated by Matthew Fox. Garden City, N.Y.: Doubleday. ISBN0-385-17045-9. OCLC6555678.