APA (7th ed.) Citation

Gerber, C., Hapka, C., & Lee, G. (2016). The secret library. Parragon Books Ltd.

Chicago Style (17th ed.) Citation

Gerber, Craig, Catherine Hapka, and Grace Lee. The Secret Library. Bath: Parragon Books Ltd, 2016.

MLA (9th ed.) Citation

Gerber, Craig, et al. The Secret Library. Parragon Books Ltd, 2016.