APA (7th ed.) Citation

Rowling, J., Tiffany, J., & Thorne, J. (2017). Harry Potter and the cursed child. Sphere.

Chicago Style (17th ed.) Citation

Rowling, J.K, John Tiffany, and Jack Thorne. Harry Potter and the Cursed Child. Sphere, 2017.

MLA (8th ed.) Citation

Rowling, J.K, et al. Harry Potter and the Cursed Child. Sphere, 2017.