Cita APA (7th ed.)

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.