APA (7th ed.) Citation

Hulme, J. N., & Cressy, M. (1999). Bubble trouble. Children's Press.

Chicago Style (17th ed.) Citation

Hulme, Joy N., and Mike Cressy. Bubble Trouble. New York: Children's Press, 1999.

MLA (9th ed.) Citation

Hulme, Joy N., and Mike Cressy. Bubble Trouble. Children's Press, 1999.