APA (7th ed.) Citation

Pomerantz, C., & Soman, D. (1998). You're not my best friend anymore. Dial Books for Young Readers.

Chicago Style (17th ed.) Citation

Pomerantz, Charlotte, and David Soman. You're Not My Best Friend Anymore. New York: Dial Books for Young Readers, 1998.

MLA (8th ed.) Citation

Pomerantz, Charlotte, and David Soman. You're Not My Best Friend Anymore. Dial Books for Young Readers, 1998.