APA (7th ed.) Citation

Osborne, M. P., Howell, T., & Homer. (2003). Sirens and sea monsters. Hyperion Books for Children.

Chicago Style (17th ed.) Citation

Osborne, Mary Pope, Troy Howell, and Homer. Sirens and Sea Monsters. New York: Hyperion Books for Children, 2003.

MLA (8th ed.) Citation

Osborne, Mary Pope, et al. Sirens and Sea Monsters. Hyperion Books for Children, 2003.