APA (7th ed.) Citation

Tillich, P., & Niebuhr, H. R. (1956). The religious situation. Meridian Books.

Chicago Style (17th ed.) Citation

Tillich, Paul, and H. Richard Niebuhr. The Religious Situation. New York: Meridian Books, 1956.

MLA (9th ed.) Citation

Tillich, Paul, and H. Richard Niebuhr. The Religious Situation. Meridian Books, 1956.