MLA

Reuben Hersh, and Reuben Hersh. 18 Unconventional Essays On the Nature of Mathematics. Springer New York, 2006.

APA

Reuben Hersh, R. Hersh, & Hersh, R. (2006). 18 Unconventional Essays on the Nature of Mathematics. Springer New York.

Chicago

Reuben Hersh, and Reuben Hersh. 18 Unconventional Essays On the Nature of Mathematics. : Springer New York, 2006.