External references edit
- ^ http://ddickerson.igc.org/cliffords-tower.html
- ^ http://www.historyofyork.org.uk/themes/norman/the-1190-massacre
- ^ http://www.bbc.co.uk/religion/religions/judaism/history/pogromyork_1.shtml
- ^ http://www.bbc.co.uk/legacies/immig_emig/england/north_yorkshire/article_1.shtml
- ^ http://www.york.ac.uk/medieval-studies/york-1190/about-york-1190-massacre-conference.html
- ^ http://www.english-heritage.org.uk/learn/story-of-england/medieval-part-1/massacre-at-cliffords-tower/