APA stil citiranja

Courant, R. (1941). What is mathematics?: What is mathematics? : an elementary approach to ideals and methods. London: Oxford University Press.

Chicago stil citiranja

Courant, Richard. What is mathematics?: What is mathematics? : an elementary approach to ideals and methods. London: Oxford University Press, 1941.

MLA stil citiranja

Courant, Richard. What is mathematics?: What is mathematics? : an elementary approach to ideals and methods. London: Oxford University Press, 1941.