https://thecrimewire.com/true-crime/the-cross-dressing-cannibal-the-murders-of-michele-dorr-and-laura-houghteling
https://web.archive.org/web/20150210070507/http://www.crimelibrary.com/blog/2012/11/20/serial-killer-spotlight-hadden-clark/index.html
https://web.archive.org/web/20131023062139/http://www.trutv.com/library/crime/serial_killers/weird/clark/index_1.html
https://www.washingtonpost.com/wp-srv/local/daily/sept99/dorr092498.htm
https://www.washingtonpost.com/wp-srv/local/longterm/library/dorr/dorr111592.htm
https://www.mirror.co.uk/news/world-news/gruesome-catalogue-cannibal-killer-sick-9351062
https://www.nydailynews.com/2016/11/26/jailed-cross-dressing-cannibal-serial-killer-tops-brothers-violent-history-claims-he-slayed-at-least-12-women/
https://web.archive.org/web/20160304112842/http://www.darkvomit.com/index.php?act=viewProd&productId=236
https://en.wikipedia.org/wiki/Hadden_Clark
https://web.archive.org/web/20141129213514/http://murderpedia.org/male.C/images/clark_hadden/info.pdf