APA (7th ed.) Citation

Tillyard, E. M. W., & Lewis, C. S. (1939). The personal heresy: A controversy. Oxford University Pres.

Chicago Style (17th ed.) Citation

Tillyard, E. M. W., and C. S. Lewis. The Personal Heresy: A Controversy. London: Oxford University Pres, 1939.

MLA (8th ed.) Citation

Tillyard, E. M. W., and C. S. Lewis. The Personal Heresy: A Controversy. Oxford University Pres, 1939.