Riordan Rick. (2016). Trials Of Apollo The Hidden Oracle. Penguin Random House.
Lua i Stíl Chicago (17ú heag.)Riordan Rick. Trials Of Apollo The Hidden Oracle. UK: Penguin Random House, 2016.
Lua MLA (9ú heag.)Riordan Rick. Trials Of Apollo The Hidden Oracle. Penguin Random House, 2016.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.