Cita APA (7th ed.)

Ording, P. (2019). 99 variations on a proof. The MIT Press.

Cita Chicago (17th ed.)

Ording, Philip. 99 Variations on a Proof. Cambridge, Massachusetts: The MIT Press, 2019.

Cita MLA (9th ed.)

Ording, Philip. 99 Variations on a Proof. The MIT Press, 2019.