1. Anderson John E. Happy Childhood. (New York: D. Appleton-Century Co., 1933, 321 pp.)
2. Child psychology.
3. Brooks Fowler D. The Psychology of Adolescence. (Boston: Houghton Mifflin Co, 1929, 652 pp.)
4. Cole Luella. Psychology of Adolescence. (New York: Farrar and Rinehart, 1936, 503 pp.)