Cita APA (7th ed.)
Mueller, D. L. (1972). Karl Barth. Word Books.
Cita Chicago (17th ed.)
Mueller, David L. Karl Barth. Waco, Tex.: Word Books, 1972.
Cita MLA (9th ed.)
Mueller, David L. Karl Barth. Word Books, 1972.
Atenció: Aquestes cites poden no estar 100% correctes.