1. Dewey, John: 1944, 'Education as a Necessity of Life' and 'Education as a Social Function', Democracy and Education, Free Press, New York.
2. McKeon, Richard: 1964, 'The Liberating Arts and the Humanizing Arts in Education', in Arthur A. Cohen (ed.), Humanistic Education and Western Civilization: Essays for Robert Maynard Hutchins, Holt, Rinehart, Winston, New York.
3. Rogers, Carl R.: 1961, '“Personal Thoughts on Teaching and Learning”, “Significant Learning: In Therapy and in Education”, and “Student-Centered Learning as Experienced by a Participant”', On Becoming a Person, Houghton Mifflin, Boston.