APA (7th ed.) Citation

Lewis, C. S. (1964). Letters to Malcolm, chiefly on prayer. Collins.

Chicago Style (17th ed.) Citation

Lewis, C. S. Letters to Malcolm, Chiefly on Prayer. London: Collins, 1964.

MLA (8th ed.) Citation

Lewis, C. S. Letters to Malcolm, Chiefly on Prayer. Collins, 1964.

Warning: These citations may not always be 100% accurate.