Doyle, C. C. (2016). Secret of the druids. Westland.
Lua i Stíl Chicago (17ú heag.)Doyle, Christopher C. Secret of the Druids. New Delhi: Westland, 2016.
Lua MLA (9ú heag.)Doyle, Christopher C. Secret of the Druids. Westland, 2016.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.