Cita APA (7th ed.)

Hersh, R. (1999). What is mathematics, really? Oxford University.

Cita Chicago (17th ed.)

Hersh, Reuben. What Is Mathematics, Really? Nueva York: Oxford University, 1999.

Cita MLA (9th ed.)

Hersh, Reuben. What Is Mathematics, Really? Oxford University, 1999.