APA način citiranja (7. izdanje)

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

Čikaški stil citiranja (17. izdanje)

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

MLA način citiranja (9. izdanje)

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