1. Frances M. Andrews and Joseph Leeder, Guiding Junior High School Pupils in Music Experiences. (Englewood Cliffs, New JerseyPrentice Hall, Inc., 1953), p. 114.
2.
2. Leland P. Bradford and Dorothy Mial, “When is a Group?”Educational Leadership, Vol. 21, No. 3 (1963), p. 148.
3.
3. J. A. C. Brown, The Social Psychology of Industry. (Baltimore, MarylandPenguin Books, 1954), p. 233.
4.
4. Joseph Luft, “Teacher and the Group Process,”NEA Journal, Vol. 52 (April 1963), p. 12.
5.
5. Brown, p. 306.
6.
6. Luft, p. 13.
7.
7. Mial, pp. 147–148.
8.
8. Herbert A. Thelen, “Purpose and Process in Groups,”Educational Leadership, Vol. 21, No. 3 (December 1963), p. 144.
9.
9. Thelen, p. 145.
10.
10. Bradford and Mial, p. 148.
11.
11. Brewster Ghiselin, editor, The Creative Process. (Berkeley, CaliforniaUniversity of California Press, 1953), p. 14.