APA (7th ed.) Citation

RYAN. (2001). Harry keeps his cool. Hodder Children's Books.

Chicago Style (17th ed.) Citation

RYAN. Harry Keeps His Cool. London: Hodder Children's Books, 2001.

MLA (9th ed.) Citation

RYAN. Harry Keeps His Cool. Hodder Children's Books, 2001.

Warning: These citations may not always be 100% accurate.