APA (7th ed.) Citation

Purtill, R. L. (1981). C.S. Lewis's case for the Christian faith. Harper & Row.

Chicago Style (17th ed.) Citation

Purtill, Richard L. C.S. Lewis's Case for the Christian Faith. San Francisco: Harper & Row, 1981.

MLA (9th ed.) Citation

Purtill, Richard L. C.S. Lewis's Case for the Christian Faith. Harper & Row, 1981.