F: Edmund A. Bowles, “The Symbolism of the Organ in the Middle Ages: A Study in the History of Ideas,” in Aspects of Medieval and Renaissance Music: A Birthday Offering to Gustave Reese, ed. Jan LaRue (W. W. Norton, 1966), 29.
B: Bowles, Edmund A. “The Symbolism of the Organ in the Middle Ages: A Study in the History of Ideas.” In Aspects of Medieval and Renaissance Music: A Birthday Offering to Gustave Reese, edited by Jan LaRue. W. W. Norton, 1966.