APA (7 ম সংস্করণ) উদ্ধৃতি

Courant, R., & Robbins, H. E. j. a. (1941). What is mathematicsn An elementary approach to ideas and methods. Oxford university press.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Courant, Rchard, এবং Herbert Ellis joint author Robbins. What Is Mathematicsn An Elementary Approach to Ideas and Methods. London, New York: Oxford university press, 1941.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

Courant, Rchard, এবং Herbert Ellis joint author Robbins. What Is Mathematicsn An Elementary Approach to Ideas and Methods. Oxford university press, 1941.