Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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