Cita APA (7th ed.)

Passmore, J. A. (1972). The perfectibility of man. Duckworth.

Cita Chicago (17th ed.)

Passmore, John Arthur. The Perfectibility of Man. London: Duckworth, 1972.

Cita MLA (9th ed.)

Passmore, John Arthur. The Perfectibility of Man. Duckworth, 1972.