Cita APA (7a ed.)

Sawyer, W. W. (1959). Prelude to mathematics (Repr.). Penguin Books.

Cita Chicago Style (17a ed.)

Sawyer, W. W. Prelude to Mathematics. Repr. Harmondsworth [etc.]: Penguin Books, 1959.

Cita MLA (9a ed.)

Sawyer, W. W. Prelude to Mathematics. Repr. Penguin Books, 1959.