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.
Cita Chicago Style (17a ed.)Catholic Church. Secretariatus ad Christianorum Unitatem Fovendam y 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.
Cita MLA (8a ed.)Catholic Church. Secretariatus ad Christianorum Unitatem Fovendam y 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.