APA (7th ed.) Citation

Tillich, P. (1963). Christianity and the encounter of the world religions. Columbia University Press.

Chicago Style (17th ed.) Citation

Tillich, Paul. Christianity and the Encounter of the World Religions. New York: Columbia University Press, 1963.

MLA (9th ed.) Citation

Tillich, Paul. Christianity and the Encounter of the World Religions. Columbia University Press, 1963.