Courant, R., Robbins, H. E., Robbins, H., & Stewart, I. (1996). What is Mathematics?: An elementary approach to ideas and methods (2nd ed.). London New York: Oxford University Press.
Παραπομπή Chicago StyleCourant, Richard, Herbert Ellis Robbins, Herbert Robbins, and Ian Stewart. What Is Mathematics?: An Elementary Approach to Ideas and Methods. 2nd ed. London New York: Oxford University Press, 1996.
Παραπομπή MLACourant, Richard, Herbert Ellis Robbins, Herbert Robbins, and Ian Stewart. What Is Mathematics?: An Elementary Approach to Ideas and Methods. 2nd ed. London New York: Oxford University Press, 1996.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.