APA (7th ed.) Citation

Cecelia Ahern. (2009). The Book of Tomorrow. HarperCollins Publishers.

Chicago Style (17th ed.) Citation

Cecelia Ahern. The Book of Tomorrow. London: HarperCollins Publishers, 2009.

MLA (9th ed.) Citation

Cecelia Ahern. The Book of Tomorrow. HarperCollins Publishers, 2009.

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