Barth, K., Wiser, A., & Blumhardt, C. (1979). Action in waiting, by Karl Barth on Christoph Blumhardt; including "Joy in the Lord" (2nd. ed.). Plough Publishing House.MLA Citation
Barth, Karl, Arthur Wiser, and Christoph Blumhardt. Action in Waiting, By Karl Barth On Christoph Blumhardt; Including "Joy in the Lord". 2nd. ed. Plough Publishing House, 1979.