APA (7th ed.) Citation

Ness, P. (2011). A monster calls (1. publ.). Walker Books.

Chicago Style (17th ed.) Citation

Ness, Patrick. A Monster Calls. 1. publ. London: Walker Books, 2011.

MLA (9th ed.) Citation

Ness, Patrick. A Monster Calls. 1. publ. Walker Books, 2011.

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