Bengtson, V. L., Settersten, R. A., Richard A.,, Kennedy, B. K., & Morrow-Howell, N. (2016). Handbook of theories of aging (Third edition.). New York: Springer Publshing Company.

Bengtson, Vern L.,, Richard A. Settersten, Richard A., Brian K. Kennedy, and Nancy Morrow-Howell. Handbook of Theories of Aging. Third edition. New York: Springer Publshing Company, 2016.

Bengtson, Vern L.,, et al. Handbook of Theories of Aging. Third edition. New York: Springer Publshing Company, 2016.