Blyton, E. (2015). The Secret Seven: Secret Seven Mystery (1st.). Hodder Children's Books.
Lua i Stíl Chicago (17ú heag.)Blyton, Enid. The Secret Seven: Secret Seven Mystery. 1st. UK: Hodder Children's Books, 2015.
Lua MLA (9ú heag.)Blyton, Enid. The Secret Seven: Secret Seven Mystery. 1st. Hodder Children's Books, 2015.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.