Columbia subject headings:
Cistercians--Bibliography.
Spiritual life--Christianity--History of doctrines--Middle Ages, 600-1500--Bibliography.
Spirituality--Catholic Church--Bibliography.
Harvard subject headings:
Cistercians--Bibliography.
Spiritual life--Christianity--History of doctrines--Middle Ages, 600-1500--Bibliography.
Spirituality--Christianity--History--Middle Ages, 600-1500--Bibliography.
Spirituality--History--Bibliography.
Princeton subject headings:
Cistercians--Bibliography.
Spirituality--History--Bibliography.