Manning, Matthew K. «1990s». A: DC Comics Year By Year A Visual Chronicle. London, United Kingdom: Dorling Kindersley, 2010, p. 265. ISBN 978-0-7566-6742-9. «Writer Paul Dini and artist Bruce Timm partnered for a special set in the animated world of the Dark Knight. Revealing the origin of the Joker's lover, popular made-for-TV character Harley Quinn, the storytelling duo crafted a sweetly disturbing award-winning tale.»
Manning, Matthew K. «2000s». A: Batman: A Visual History. London, United Kingdom: Dorling Kindersley, 2014, p. 274. ISBN 978-1465424563. «Writer Paul Dini and artist Bruce Timm crafted this tale set in the DC Animated Universe and starring the odd couple of Harley Quinn and Poison Ivy.»
