The (r)evolution of Harley Quinn: from jester to sex symbol – Behind The Panels
Harley Quinn | Comics Amino
Harley Quinn creator Paul Dini reflects on 25 years of high jinks | EW.com
Amazon.com: Harley Quinn Vol. 1: Hot in the City (The New 52) (Harley Quinn (Numbered)): 9781401254155: Palmiotti, Jimmy, Conner, Amanda, Hardin, Chad: Books