Callahan, A. (1992). Spiritual guides for today: Evelyn Underhill, Dorothy Day, Karl Rahner, Simone Weil, Thomas Merton, Henri Nouwen. Crossroad.
Chicago Style (17. basım) AtıfCallahan, Annice. Spiritual Guides for Today: Evelyn Underhill, Dorothy Day, Karl Rahner, Simone Weil, Thomas Merton, Henri Nouwen. New York: Crossroad, 1992.
MLA (8th ed.) AtıfCallahan, Annice. Spiritual Guides for Today: Evelyn Underhill, Dorothy Day, Karl Rahner, Simone Weil, Thomas Merton, Henri Nouwen. Crossroad, 1992.
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