Episcopal Church. Enriching Our Worship 1: Morning and Evening Prayer, the Great Litany, the Holy Eucarist : Supplemental Liturgical Materials. New York: Church Pub. Inc, 1998.
Giorgi, Rosa, and Stefano Zuffi. Saints in Art. A guide to imagery. Los Angeles: The J. Paul Getty Museum, 2003. Annotated link http://www.diigo.com/bookmark/http%3A%2F%2Fworldcat.org%2Foclc%2F50982363
Osborn, Fairfield. The Limits of the Earth. Boston: Little, Brown, 1953. Annotated link http://www.diigo.com/bookmark/http%3A%2F%2Fworldcat.org%2Foclc%2F233960