McClendon, Jr., James William. “Expanding the Theory: Charles Edward Ives — Theologian in Music.” In Biography as theology: how life stories can remake today’s theology. Eugene, OR: Wipf and Stock Publishers, 1990.
Edmunds, John and Gordon Boelzner. Some twentieth century American composers, v. 1-2: a selective bibliography. New York, NY: New York Public Library, 1959.