APA (7th ed.) Citation

Troeltsch, E. (1931). The social teaching of the Christian churches. [s.n.].

Chicago Style (17th ed.) Citation

Troeltsch, Ernst. The Social Teaching of the Christian Churches. New York: [s.n.], 1931.

MLA (9th ed.) Citation

Troeltsch, Ernst. The Social Teaching of the Christian Churches. [s.n.], 1931.