Cita APA (7a ed.)

Butler, R. N., & Lewis, M. I. (1973). Aging and mental health: Positive psychosocial approaches. Mosby.

Cita Chicago Style (17a ed.)

Butler, Robert N., y Myrna I. Lewis. Aging and Mental Health: Positive Psychosocial Approaches. Saint Louis: Mosby, 1973.

Cita MLA (9a ed.)

Butler, Robert N., y Myrna I. Lewis. Aging and Mental Health: Positive Psychosocial Approaches. Mosby, 1973.