APA

Harkness G. E., . (1947). Understanding the Christian faith. New York: Abingdon-Cokesbury Press.

Chicago

Harkness Georgia Elma, . 1947. Understanding the Christian faith. New York: Abingdon-Cokesbury Press.

Harvard

Harkness G. E., . (1947). Understanding the Christian faith. New York: Abingdon-Cokesbury Press.

MLA

Harkness Georgia Elma, . Understanding the Christian faith. New York: Abingdon-Cokesbury Press. 1947.