Tillich, P., Ratschow, C. H., & Clayton, J. P. (1987). Writings in the philosophy of religion. De Gruyter ; Evangelisches Verlagswerk.
Citazione stile Chigago Style (17a edizione)Tillich, Paul, Carl Heinz Ratschow, e John Powell Clayton. Writings in the Philosophy of Religion. Berlin ; New York : Frankfurt a. M.: De Gruyter ; Evangelisches Verlagswerk, 1987.
Citatione MLA (9a ed.)Tillich, Paul, et al. Writings in the Philosophy of Religion. De Gruyter ; Evangelisches Verlagswerk, 1987.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.