BLYTON, E. (2013). THE RIDDLE OF THE HOLLOW TREE. BOUNTY BOOKS.
Lua i Stíl Chicago (17ú heag.)BLYTON, ENID. THE RIDDLE OF THE HOLLOW TREE. BOUNTY BOOKS, 2013.
Lua MLA (9ú heag.)BLYTON, ENID. THE RIDDLE OF THE HOLLOW TREE. BOUNTY BOOKS, 2013.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.