APA Citation

Courant, R. ;. R. What is Mathematics? Oxford University Press, London, 1946.

Chicago Style Citation

Courant, Richard ; Robbins. What Is Mathematics? Oxford University Press, London, 1946.

MLA Citation

Courant, Richard ; Robbins. What Is Mathematics? Oxford University Press, London, 1946.

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