Cita APA

Courant, R., & Robbins, H. (1969). What is mathematics?: An elementary approach to ideas and methods Oxford University Press.

Citación estilo Chicago

Courant, Richard, and Herbert Robbins. What Is Mathematics?: An Elementary Approach to Ideas and Methods. [4th ed.?]. London: Oxford University Press, 1969.

Cita MLA

Courant, Richard, and Herbert Robbins. What Is Mathematics?: An Elementary Approach to Ideas and Methods. [4th ed.?]. London: Oxford University Press, 1969.