Courant, R., Robbins, H., & Stewart, I. (1996). What is mathematics?: An elementary approach to ideas and methods (2nd ed.). Oxford University Press.
استشهاد بنمط شيكاغوCourant, Richard, Herbert Robbins, و Ian Stewart. What Is Mathematics?: An Elementary Approach to Ideas and Methods. 2nd ed. New York: Oxford University Press, 1996.
MLA استشهادCourant, Richard, et al. What Is Mathematics?: An Elementary Approach to Ideas and Methods. 2nd ed. Oxford University Press, 1996.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.