O’Connell, H. J. (1966). Practical Problems of Ecumenism. Liguori, Mo..
Lua i Stíl Chicago (17ú heag.)O’Connell, Hugh J. Practical Problems of Ecumenism. Liguori, Mo., 1966.
Lua MLA (8ú heag.)O’Connell, Hugh J. Practical Problems of Ecumenism. Liguori, Mo., 1966.
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