Cita APA (7a ed.)

Butler, R. N., Lewis, M. I., & Sunderland, T. (1991). Aging and mental health: Positive psychosocial and biomedical approaches (4th ed.). Merrill/Macmillan.

Cita Chicago Style (17a ed.)

Butler, Robert N., Myrna I. Lewis, y Trey Sunderland. Aging and Mental Health: Positive Psychosocial and Biomedical Approaches. 4th ed. New York: Merrill/Macmillan, 1991.

Cita MLA (9a ed.)

Butler, Robert N., et al. Aging and Mental Health: Positive Psychosocial and Biomedical Approaches. 4th ed. Merrill/Macmillan, 1991.