Barrow, J. D. (1999). Impossibility: The limits of science and the science of limits. Vintage.
Lua i Stíl Chicago (17ú heag.)Barrow, John D. Impossibility: The Limits of Science and the Science of Limits. London: Vintage, 1999.
Lua MLA (8ú heag.)Barrow, John D. Impossibility: The Limits of Science and the Science of Limits. Vintage, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.