Prelude to mathematics

MLA

Sawyer, Walter Warwick. Prelude to Mathematics. Repr. Harmondsworth: Penguin books, 1963.

APA

Sawyer, W. Warwick. (1963). Prelude to mathematics. Repr. Harmondsworth: Penguin books.

Chicago

Sawyer, Walter Warwick, Prelude to Mathematics. Repr. Harmondsworth: Penguin books, 1963.