APA (7th ed.) Citation

Arnold, T. (2001). Help! I'm cracking up! Puffin Books.

Chicago Style (17th ed.) Citation

Arnold, Tedd. Help! I'm Cracking Up! Ringwood, Victoria [u.a.]: Puffin Books, 2001.

MLA (9th ed.) Citation

Arnold, Tedd. Help! I'm Cracking Up! Puffin Books, 2001.