Cronin, D. K. (1999). Holy ground: Celtic Christian spirituality. Upper Room Books.
Lua i Stíl Chicago (17ú heag.)Cronin, Deborah K. Holy Ground: Celtic Christian Spirituality. Nashville, TN.: Upper Room Books, 1999.
Lua MLA (8ú heag.)Cronin, Deborah K. Holy Ground: Celtic Christian Spirituality. Upper Room Books, 1999.
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