APA (7th ed.) Citation

Child, L., & Noble, C. (2011). My best, best friend (First published in the US.). Dial Books for Young Readers.

Chicago Style (17th ed.) Citation

Child, Lauren, and Carol Noble. My Best, Best Friend. First published in the US. New York: Dial Books for Young Readers, 2011.

MLA (9th ed.) Citation

Child, Lauren, and Carol Noble. My Best, Best Friend. First published in the US. Dial Books for Young Readers, 2011.