Merton, T., & Shannon, W. H. (1985). The hidden ground of love: The letters of Thomas Merton on religious experience and social concerns. Farrar, Straus, Giroux.

Merton, Thomas, and William Henry Shannon. The Hidden Ground of Love: The Letters of Thomas Merton on Religious Experience and Social Concerns. New York: Farrar, Straus, Giroux, 1985.

Merton, Thomas, and William Henry Shannon. The Hidden Ground of Love: The Letters of Thomas Merton on Religious Experience and Social Concerns. Farrar, Straus, Giroux, 1985.