Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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