APA Style

Blyton, Enid. (2013). The Riddle Of The Hollow Tree . London: Bounty Books.

Chicago Style

Blyton, Enid. The Riddle Of The Hollow Tree. London: Bounty Books, 2013. .

MLA Style

Blyton, Enid. The Riddle Of The Hollow Tree. London: Bounty Books, 2013. .

Turabian Style

Blyton, Enid. The Riddle Of The Hollow Tree. London: Bounty Books, 2013. .