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.
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