Courant, R., & Robbins, H. E. j. a. (1941). What is mathematicsn An elementary approach to ideas and methods. Oxford university press.
Citação do estilo Chicago (17ª ed.)Courant, Rchard, e Herbert Ellis joint author Robbins. What Is Mathematicsn An Elementary Approach to Ideas and Methods. London, New York: Oxford university press, 1941.
Citação MLA (9ª ed.)Courant, Rchard, e Herbert Ellis joint author Robbins. What Is Mathematicsn An Elementary Approach to Ideas and Methods. Oxford university press, 1941.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.