Chwilio am undod Cristnogol : fersiwn boblogaidd o'r Cyfarwyddiadur cymhwyso egwyddorion a normau eciwmeniaeth /
Catholic Church.Bishops' Conference of England and Wales.
Pontifical Council for Promoting Christian Unity.Directory for the application of princples and norms on ecumenism.
Llundain : Gwasanaeth Cyfathrebu Catholig,
2002.
Includes bibliographical references.
Catholic Church
Christian union