Courant, R. a. R. H. (1946). What is mathematics? Oxford University.
Cita Chicago (17th ed.)Courant, Richard and Robbins Herbert. What Is Mathematics? Oxford University, 1946.
Cita MLA (9th ed.)Courant, Richard and Robbins Herbert. What Is Mathematics? Oxford University, 1946.
Atenció: Aquestes cites poden no estar 100% correctes.