Llyod, J. &. o. (2012). 1227, QI Facts - To below your Socks off. Faber and faber.
Lua i Stíl Chicago (17ú heag.)Llyod, John & others. 1227, QI Facts - To Below Your Socks off. London: Faber and faber, 2012.
Lua MLA (9ú heag.)Llyod, John & others. 1227, QI Facts - To Below Your Socks off. Faber and faber, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.