Carl Rogers, ‘Toward a Modern Approach to Values: The Valuing Process in the Mature Person’ (1964), The Carl Rogers Reader, eds. Howard Kirschenbaum and Valerie Henderson (New York: Houghton Mifflin, 1989) 168-185.
Carl Rogers, ‘A Theory of Therapy, Personality and Interpersonal Relationships as Developed in the Client-Centred Framework’, Psychology: A Study of Science, Volume 3: Formulations of the Person and the Social Context, ed. Sigmund Koch (New York: McGraw-Hill, 1959) 184-256.
Eugene Gendlin, ‘Client-Centered and Experiential Psychotherapy’, Innovations in Client-Centered Therapy, eds. David Wexler and Laura Rice (New York: John Wiley & Sons, 1974) 211-246.
Eugene Gendlin, ‘The Concept of Congruence Reformulated in terms of Experiencing’, Counseling Center Discussion Papers 5:12 (Chicago: University of Chicago Library, 1959).