Zur Ethik der Revolution / James M. Gustafson, Johan Marie de Jong, Richard Shaull. - Gustafson, James M. (OLS)http://pul/name/41942; Shaull, Richard. (OLS)http://pul/name/41943; de Jong, Johan Marie. (OLS)http://pul/name/30756 (Kreuz-Verlag, 1970)
Bibliografia in nota.