"Franz Ittenbach". Catholic Encyclopedia. New York: Robert Appleton Company. ↑ Modern Catholic Social Teaching edited by Kenneth R. Himes and Lisa Sowle Cahill, pg 110 ↑ 'God's Little Artist' Gwen John at the BBC ↑ Tate Gallery ↑ David Jones by Davis Blamires ↑ Gothic Pride by Brian Regan, pgs 21-23 ↑ Raised by the Church by Edward Rohs and Judith Estrine, pg 31 ↑ Adam Kossowski: Murals and Paintings with contributions by Benedict Read, Tadeusz Chrzanowski, Martin Sankey, Adam Kossowski, Tymon Terlecki, and Andrew Borkowski.