Cita APA (7th ed.)

Havil, J. (2008). Impossible?: Surprising solutions to counterintuitive conundrums. Princeton University Press.

Cita Chicago (17th ed.)

Havil, Julian. Impossible?: Surprising Solutions to Counterintuitive Conundrums. Princeton, N.J: Princeton University Press, 2008.

Cita MLA (9th ed.)

Havil, Julian. Impossible?: Surprising Solutions to Counterintuitive Conundrums. Princeton University Press, 2008.