Cita APA (7th ed.)

Butler, R. N., & Lewis, M. I. (1976). The later years: A guide to sexual and emotional adjustment. Sun Books.

Cita Chicago (17th ed.)

Butler, Robert N., i Myrna I. Lewis. The Later Years: A Guide to Sexual and Emotional Adjustment. South Melbourne, Vic.: Sun Books, 1976.

Cita MLA (8th ed.)

Butler, Robert N., i Myrna I. Lewis. The Later Years: A Guide to Sexual and Emotional Adjustment. Sun Books, 1976.