Deary, T. (2016). Vicious Vikings. Scholastic.
Lua i Stíl Chicago (17ú heag.)Deary, Terry. Vicious Vikings. london: Scholastic, 2016.
Lua MLA (8ú heag.)Deary, Terry. Vicious Vikings. Scholastic, 2016.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.