A guide to all the different Harley Quinn movies being developed - Polygon

The art in Harley Quinn's new DC comic, Birds of Prey, is unbelievable - Polygon

Evolution of Harley Quinn in movies and TV Series from 1992

Unrealized and other DCEU projects, DC Extended Universe Wiki

The Psychology of Harley Quinn: A character analysis – Girl-On-Comic-Book-World

The Suicide Squad: Every Change To Harley Quinn From 2016 & Birds of Prey

Harley Quinn: Season 4

Slideshow: Birds of Prey: Comparing the Characters' Looks Through the Years

REVIEW: DC Universe's Harley Quinn Animated Series Is Foul-Mouthed Fun

Pathfinder Character Conversion Guide For Harley Quinn (cross post from /r/Pathfinder_RPG) : r/rpg

Harley Quinn: Birds of Prey' - Margot Robbie's Film is Fantastic, birds prey harley quinn

Which Movie had the best Harley Quinn Performance : r/DC_Cinematic