Courant, R., Robbins, H., & Stewart, I. (1996). What is mathematics: An elementary approach to ideas and methods.
Citazione stile Chigago Style (17a edizione)Courant, Richard, Herbert Robbins, e Ian Stewart. What Is Mathematics: An Elementary Approach to Ideas and Methods. Oxford Univ. Press, 1996.
Citatione MLA (9a ed.)Courant, Richard, et al. What Is Mathematics: An Elementary Approach to Ideas and Methods. 1996.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.