Cita APA (7a ed.)

Butler, R. N., & Lewis, M. I. (1977). Aging and mental health: Positive psychosocial approaches (2nd ed.). Mosby.

Cita Chicago Style (17a ed.)

Butler, Robert N., y Myrna I. Lewis. Aging and Mental Health: Positive Psychosocial Approaches. 2nd ed. St. Louis: Mosby, 1977.

Cita MLA (9a ed.)

Butler, Robert N., y Myrna I. Lewis. Aging and Mental Health: Positive Psychosocial Approaches. 2nd ed. Mosby, 1977.