Gaya APA

J., V, D, B, A. (1981). Voices of Unity: Essays in Hour of Willem Adolf Visser't Hooft on the Occasion of his 80th Birthday . Geneva: World Council of Churches.

Gaya MLA

J., Van, Der, BENT,, A.. "Voices of Unity: Essays in Hour of Willem Adolf Visser't Hooft on the Occasion of his 80th Birthday". Geneva: World Council of Churches, 1981. Text.