APA (7th ed.) Citation

Lewis, C. S. (1964). Letters to Malcolm, chiefly on prayer (1. publ.). Bles.

Chicago Style (17th ed.) Citation

Lewis, C. S. Letters to Malcolm, Chiefly on Prayer. 1. publ. London: Bles, 1964.

MLA (8th ed.) Citation

Lewis, C. S. Letters to Malcolm, Chiefly on Prayer. 1. publ. Bles, 1964.

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