APA (7th ed.) Citation

O'Connor, J., Preiss-Glasser, R., & Enik, T. (2009). The 100th day of school. HarperCollins.

Chicago Style (17th ed.) Citation

O'Connor, Jane, Robin Preiss-Glasser, and Ted Enik. The 100th Day of School. New York: HarperCollins, 2009.

MLA (8th ed.) Citation

O'Connor, Jane, et al. The 100th Day of School. HarperCollins, 2009.

Warning: These citations may not always be 100% accurate.