1. American Psychiatric Association. (1968).Diagnostic and statistical manual of mental disorders (2nd ed.). Washington, DC: Author.
2. Barrett, J. T. (1980).Basic immunology and its medical applications. St. Louis, MO: Mosby.
3. Bartop, R., Lazarus, L., Luckhurst, E., Kiloh, L. G., & Penny, R. (1977). Depressed lymphocyte function after bereavement.Lancet, 1 834?836.
4. Benson, H. (1975).The relaxation response. New York: William Morrow.
5. Brandtzaeg, P., Fjellanger, I., & Gjeruldsen, S. (1979). Human secretory immunoglobulins: I. Salivary secretions from individuals with normal or low levels of serum immunoglobulins.Scandinavian Journal of Hematology, 12 1?15.