APA (7th ed.) Citation

Barker, J. M. (1919). The social gospel and the new era. Macmillan.

Chicago Style (17th ed.) Citation

Barker, John Marshall. The Social Gospel and the New Era. New York: Macmillan, 1919.

MLA (8th ed.) Citation

Barker, John Marshall. The Social Gospel and the New Era. Macmillan, 1919.