Butler, R. N., & Lewis, M. I. (1981). Aging [and] mental health: Positive psychosocial and biomedical approaches (3rd ed.). The C.V. Mosby.

Butler, Robert N., and Myrna I. Lewis. Aging [and] Mental Health: Positive Psychosocial and Biomedical Approaches. 3rd ed. St. Louis, Missouri: The C.V. Mosby, 1981.

Butler, Robert N., and Myrna I. Lewis. Aging [and] Mental Health: Positive Psychosocial and Biomedical Approaches. 3rd ed. The C.V. Mosby, 1981.