Riordan Rick. (2017). Trials OF Apollo The Dark Prophecy. Penguin Random House.
Lua i Stíl Chicago (17ú heag.)Riordan Rick. Trials OF Apollo The Dark Prophecy. UK: Penguin Random House, 2017.
Lua MLA (9ú heag.)Riordan Rick. Trials OF Apollo The Dark Prophecy. Penguin Random House, 2017.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.