Catholic Church. Secretariatus ad Christianorum Unitatem Fovendam & Catholic Church. Secretariatus ad Christianorum Unitatem Fovendam. (1970). Directory for the application of the decisions of the Second Vatican Council concerning ecumenical matters, April 16, 1970. National Conference of Catholic Bishops.
Chicago (17e ed.) BronvermeldingCatholic Church. Secretariatus ad Christianorum Unitatem Fovendam en Catholic Church. Secretariatus ad Christianorum Unitatem Fovendam. Directory for the Application of the Decisions of the Second Vatican Council Concerning Ecumenical Matters, April 16, 1970. Washington, D.C.: National Conference of Catholic Bishops, 1970.
MLA (8e ed.) BronvermeldingCatholic Church. Secretariatus ad Christianorum Unitatem Fovendam en Catholic Church. Secretariatus ad Christianorum Unitatem Fovendam. Directory for the Application of the Decisions of the Second Vatican Council Concerning Ecumenical Matters, April 16, 1970. National Conference of Catholic Bishops, 1970.