APA (7th ed.) Citation

Niebuhr, R. (1934). Reflections on the end of an era. C. Scribner's Sons.

Chicago Style (17th ed.) Citation

Niebuhr, Reinhold. Reflections on the End of an Era. New York, London: C. Scribner's Sons, 1934.

MLA (9th ed.) Citation

Niebuhr, Reinhold. Reflections on the End of an Era. C. Scribner's Sons, 1934.