APA (7th ed.) Citation

Carroll, L., & Oxenbury, H. (1999). It's my own inventiom. Walker Books Ltd..

Chicago Style (17th ed.) Citation

Carroll, Lewis, and Helen Oxenbury. It's My Own Inventiom. London: Walker Books Ltd., 1999.

MLA (8th ed.) Citation

Carroll, Lewis, and Helen Oxenbury. It's My Own Inventiom. Walker Books Ltd., 1999.