Manning, Matthew K.; Dolan, Hannah, ed. (2010). „1980s”. DC Comics Year By Year A Visual Chronicle. Dorling Kindersley. стр. 233. ISBN978-0-7566-6742-9. „Crafted with meticulous detail and brilliantly expressive art, Batman: The Killing Joke was one of the most powerful and disturbing stories in the history of Gotham City.”CS1 одржавање: Текст вишка: списак аутора (веза)