"Third Sunday of Advent: Keeping Our Hearts Open in Hell". Fr. Richard Rohr's homily at the Center for Action and Contemplation, cac.org. December 16, 2012.
Henry Kirke White (1824). “The prose remains of Henry Kirke White, of Nottingham, late of St. John's College, Cambridge, containing his letters, essays, and some account of his life”, p.117
Arthur Penrhyn Stanley (1863). “Sermons Preached Before His Royal Highness the Prince of Wales: During His Tour in the East in the Spring of 1862 with Notices of Some of the Localities Visited”, p.95
Thomas Yellowtail, Michael Oren Fitzgerald (1994). “Yellowtail, Crow Medicine Man and Sun Dance Chief: An Autobiography”, p.179, University of Oklahoma Press