BLYTON, E. (2013). THE RIDDLE OF THE HOLLOW TREE. BOUNTY BOOKS.
Cita Chicago (17th ed.)BLYTON, ENID. THE RIDDLE OF THE HOLLOW TREE. BOUNTY BOOKS, 2013.
Cita MLA (9th ed.)BLYTON, ENID. THE RIDDLE OF THE HOLLOW TREE. BOUNTY BOOKS, 2013.
Atenció: Aquestes cites poden no estar 100% correctes.