BLYTON, E. (2014). HAPPY DAYS: HELLO MR TWIDDLE! BOUNTY BOOKS.
Cita Chicago (17th ed.)BLYTON, ENID. HAPPY DAYS: HELLO MR TWIDDLE! LONDON: BOUNTY BOOKS, 2014.
Cita MLA (9th ed.)BLYTON, ENID. HAPPY DAYS: HELLO MR TWIDDLE! BOUNTY BOOKS, 2014.
Atenció: Aquestes cites poden no estar 100% correctes.