Catholic Church. Secretariatus ad Christianorum Unitatem Fovendam & United States Catholic Conference. (1967). Directory for the application of the decisions of the Second Ecumenical Council of the Vatican concerning ecumenical matters. United States Catholic Conference.
Παραπομπή σε μορφή Chicago (17η εκδ.)Catholic Church. Secretariatus ad Christianorum Unitatem Fovendam και United States Catholic Conference. Directory for the Application of the Decisions of the Second Ecumenical Council of the Vatican Concerning Ecumenical Matters. [Washington, D.C.]: United States Catholic Conference, 1967.
Παραπομπή σε μορφή MLA (8th εκδ.)Catholic Church. Secretariatus ad Christianorum Unitatem Fovendam και United States Catholic Conference. Directory for the Application of the Decisions of the Second Ecumenical Council of the Vatican Concerning Ecumenical Matters. United States Catholic Conference, 1967.