pages 11-15. 维基共享资源上的相关多媒体资源:但丁紀念碑 The Dante statue (页面存档备份,存于互联网档案馆), Florentine, Chipping away at the Italian language, Deirdre Pirro, JANUARY 27, 2011
University of California Press. 2000. ISBN 978-0-520-22202-1. Meintel, Deirdre. When There Is No Conversion: Spiritualists and Personal Religious Change