MLA

Herrmann, Wilhelm, et al. The Commission of the Christian with God : Described On the Basis of Luther's Statements. 2nd ed. [reprinted] / [edited and with an introduction by Robert T. Voelkel]. London: SCM Press, 1972.

APA

Herrmann, W., Stanyon, J. Sandys, Stewart, R. W, & Voelkel, R. T. (1972). The commission of the Christian with God : described on the basis of Luther's statements. 2nd ed. [reprinted] / [edited and with an introduction by Robert T. Voelkel]. London: SCM Press.

Chicago

Herrmann, Wilhelm, The Commission of the Christian with God: Described On the Basis of Luther's Statements. Translated by J Sandys Stanyon. Edited by R. W Stewart and Robert T Voelkel. 2nd ed. [reprinted] / [edited and with an introduction by Robert T. Voelkel]. London: SCM Press, 1972.