| Book reference is to: Martin E.P. Seligman, Ph.D., Learned Optimism: How to Change Your Mind and Your Life (New York: Alfred A. Knopf, Inc., 1991). |
| Book reference is to: Martin E.P. Seligman, Ph.D., Learned Optimism: How to Change Your Mind and Your Life (New York: Alfred A. Knopf, Inc., 1991). |