APA (7th ed.) Citation

Castle, C., & Illustrated by Andrew Crowson. (2000). Snip snap croc. Walker Childerns Books.

Chicago Style (17th ed.) Citation

Castle, Caroline, and Illustrated by Andrew Crowson. Snip Snap Croc. UK: Walker Childerns Books, 2000.

MLA (9th ed.) Citation

Castle, Caroline, and Illustrated by Andrew Crowson. Snip Snap Croc. Walker Childerns Books, 2000.