APA

Harkness G. E., . (1949). The Gospel and our world. New York: Abingdon-Cokesbury Press.

Chicago

Harkness Georgia Elma, . 1949. The Gospel and our world. New York: Abingdon-Cokesbury Press.

Harvard

Harkness G. E., . (1949). The Gospel and our world. New York: Abingdon-Cokesbury Press.

MLA

Harkness Georgia Elma, . The Gospel and our world. New York: Abingdon-Cokesbury Press. 1949.