Courant, R., Robbins, H., & Stewart, I. (1996). What is mathematics?: An elementary approach to ideas and methods (Second edition.). Oxford University Press.
Citação do estilo Chicago (17ª ed.)Courant, Richard, Herbert Robbins, e Ian Stewart. What Is Mathematics?: An Elementary Approach to Ideas and Methods. Second edition. New York: Oxford University Press, 1996.
Citação MLA (9ª ed.)Courant, Richard, et al. What Is Mathematics?: An Elementary Approach to Ideas and Methods. Second edition. Oxford University Press, 1996.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.