APA (7th ed.) Citation

David Walliams. (2015). Grandpa's great escape. HarperCollins Children's Books.

Chicago Style (17th ed.) Citation

David Walliams. Grandpa's Great Escape. London: HarperCollins Children's Books, 2015.

MLA (9th ed.) Citation

David Walliams. Grandpa's Great Escape. HarperCollins Children's Books, 2015.

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