Courant, R., & Robbins, H. E. j. a. (1941). What is mathematicsn An elementary approach to ideas and methods. Oxford university press.
Цитирование в стиле Чикаго (17-е изд.)Courant, Rchard, и Herbert Ellis joint author Robbins. What Is Mathematicsn An Elementary Approach to Ideas and Methods. London, New York: Oxford university press, 1941.
Цитирование MLA (9-е изд.)Courant, Rchard, и Herbert Ellis joint author Robbins. What Is Mathematicsn An Elementary Approach to Ideas and Methods. Oxford university press, 1941.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.