Courant,Richard, Robbins,Herbert, & Stewart, I. (1996). What is mathematics?: :an elementary approach to ideas and methods/ 2nd ed (2nd ed.). Oxford university press.
استشهاد بنمط شيكاغوCourant,Richard, Robbins,Herbert, و Ian Stewart. What Is Mathematics?: :an Elementary Approach to Ideas and Methods/ 2nd Ed. 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. 2nd ed. Oxford university press, 1996.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.