O'Brien, J. A. (1940). How to find Christ's Church: Charts show the way. [Catholic Information Society].
Chicago-viite (17. p.)O'Brien, John A. How to Find Christ's Church: Charts Show the Way. [New York]: [Catholic Information Society], 1940.
MLA-viite (8. p.)O'Brien, John A. How to Find Christ's Church: Charts Show the Way. [Catholic Information Society], 1940.
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