Armstrong, R. (1984). Out to change the world: A life of Father James Keller of the Christophers. Crossroad.
Chicago-viite (17. p.)Armstrong, Richard. Out to Change the World: A Life of Father James Keller of the Christophers. New York: Crossroad, 1984.
MLA-viite (8. p.)Armstrong, Richard. Out to Change the World: A Life of Father James Keller of the Christophers. Crossroad, 1984.
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