Aulen, Gustaf. The Faith of the Christian Church. Philadelphia: Muhlenberg Press, 1948. Print.
Forell, George W. The Protestant Faith. Englewood Cliffs, NJ: Prentice-Hall, 1960. Print.
Pieper, Franz. Christian Dogmatics. Saint Louis: Concordia Pub. House, 1950. Print.
Mueller, John T, and Franz Pieper. Christian Dogmatics: A Handbook of Doctrinal Theology for Pastors, Teachers, and Laymen. St. Louis, Mo: Concordia Pub. House, 1934. Print.