Messenger, S. (2020). Keeper of the Cities: Unlocked No. 8.5. Simon & Schuster UK Ltd.
Lua i Stíl Chicago (17ú heag.)Messenger, Shannon. Keeper of the Cities: Unlocked No. 8.5. London: Simon & Schuster UK Ltd, 2020.
Lua MLA (9ú heag.)Messenger, Shannon. Keeper of the Cities: Unlocked No. 8.5. Simon & Schuster UK Ltd, 2020.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.