APA (7th ed.) Citation

Sawyer, W. W. (1964). Vision in elementary mathematics. Penguin Books.

Chicago Style (17th ed.) Citation

Sawyer, W. W. Vision in Elementary Mathematics. Harmondsworth, Eng.: Penguin Books, 1964.

MLA (9th ed.) Citation

Sawyer, W. W. Vision in Elementary Mathematics. Penguin Books, 1964.

Warning: These citations may not always be 100% accurate.