Cottrell, D. (2013). The Magic Question. TMH.
Lua i Stíl Chicago (17ú heag.)Cottrell, David. The Magic Question. New delhi: TMH, 2013.
Lua MLA (9ú heag.)Cottrell, David. The Magic Question. TMH, 2013.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.