APA (7e ed.) Bronvermelding

Courant, R., & Robbins, H. (1941). What is mathematics?: An elementary approach to ideas and methods. Oxford University Press.

Chicago (17e ed.) Bronvermelding

Courant, Richard, en Herbert Robbins. What Is Mathematics?: An Elementary Approach to Ideas and Methods. London: Oxford University Press, 1941.

MLA (9e ed.) Bronvermelding

Courant, Richard, en Herbert Robbins. What Is Mathematics?: An Elementary Approach to Ideas and Methods. Oxford University Press, 1941.