APA (7th ed.) Citation

Rowling, J. (2019). Harry Potter and the prisoner of Azkaban: Slytherin (20th anniversary edition.). Bloomsbury Children's Books.

Chicago Style (17th ed.) Citation

Rowling, J.K. Harry Potter and the Prisoner of Azkaban: Slytherin. 20th anniversary edition. London: Bloomsbury Children's Books, 2019.

MLA (9th ed.) Citation

Rowling, J.K. Harry Potter and the Prisoner of Azkaban: Slytherin. 20th anniversary edition. Bloomsbury Children's Books, 2019.

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