500 Comicbook Villains (Collins & Brown, 2004), pp. 55 Norman Osborn is number 13 Archived October 21, 2013, at the Wayback Machine IGN.
500 Comicbook Villains (Collins & Brown, 2004), pp. 55 Norman Osborn is number 13 — IGN Norman Osborn is number 13 Архивировано 21 октября 2013 года.