Troeltsch, E. (1931). The social teaching of the Christian churches. [s.n.].
Cita Chicago (17th ed.)Troeltsch, Ernst. The Social Teaching of the Christian Churches. New York: [s.n.], 1931.
Cita MLA (9th ed.)Troeltsch, Ernst. The Social Teaching of the Christian Churches. [s.n.], 1931.
Atenció: Aquestes cites poden no estar 100% correctes.