Cita APA (7a ed.)

Fearnsides, W., & Bulman, O. (1966). The psychology of human ageing. Penguin Books.

Cita Chicago Style (17a ed.)

Fearnsides, W.G, y O.M.B Bulman. The Psychology of Human Ageing. Harmondsworth, Middlesex, England: Penguin Books, 1966.

Cita MLA (8a ed.)

Fearnsides, W.G, y O.M.B Bulman. The Psychology of Human Ageing. Penguin Books, 1966.