Karen Black E! Online - Fact Sheet - Filmography. http://www.eonline.com/Facts/People/0,12,1704,00.html

Karen Black Online Official site with news, pictures, biography, filmography and personal stories by actress herself. http://www.karenblackonline.com/

Karen Black IMDb - Filmography. http://us.imdb.com/name/nm0000947/

Warren Beatty Biography, filmography, and trivia from Internet Movie Database. http://us.imdb.com/name/nm0000886/bio