Radano, J. A. 1., & Gassmann, G. 1. (1991). The unity of the Church as koinonia: Ecumenical perspectives on the 1991 Canberrra statement on unity : a study document requested by the Joint Working Group between the Roman Catholic Church and the World Council of Churches. Geneva: WCC Publications.

Radano, John A. 1938-, and Günther 1931-2017 Gassmann. The Unity of the Church As Koinonia: Ecumenical Perspectives On the 1991 Canberrra Statement On Unity : A Study Document Requested By the Joint Working Group between the Roman Catholic Church and the World Council of Churches. Geneva: WCC Publications, 1991.

Radano, John A. 1938-, and Günther 1931-2017 Gassmann. The Unity of the Church As Koinonia: Ecumenical Perspectives On the 1991 Canberrra Statement On Unity : A Study Document Requested By the Joint Working Group between the Roman Catholic Church and the World Council of Churches. Geneva: WCC Publications, 1991.