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2. Cited in: Houle CO. Patterns of learning. San Francisco: Jossey-Bass, 1984: 156.
3. The hospital as a college. In: Aequanimitas with other addresses to medical students, nurses and practitioners of medicine. 3rd Ed. Philadelphia: Blackiston Co., 1954.
4. ed The democratic man: selected writings of Eduard C. Lindeman. Boston: Beacon Press, 1956.
5. Cited in: The modern practice of adult education. Andragogy versus pedagogy. New York: Association Press, 1970: 51.