APA

Duff E., . (1956). The social thought of the World Council of Churches. New York: Association Press.

Chicago

Duff Edward, . 1956. The social thought of the World Council of Churches. New York: Association Press.

Harvard

Duff E., . (1956). The social thought of the World Council of Churches. New York: Association Press.

MLA

Duff Edward, . The social thought of the World Council of Churches. New York: Association Press. 1956.