Guidelines on Dialogue with People of Living Faiths and Ideologies (2010)
(World Council of Churches)

A simple Guide to Interfaith Dialogue adpated from the WCC Guidelines above. 

Ecumenical Considerations on Jewish-Christian Dialogue (1982)
(World Council of Churches)

Dictionary of the Ecumenical Movement on Interfaith Dialogues (2002)

Article by S. Wesley Ariarajah, from the revised edition of the Dictionary of the Ecumenical Movement published jointly by the World Council of Churches and Eerdmans Publishing Company.