Lewis, C. S. (1964). Letters to Malcolm: Chiefly on prayer. G. Bles.
Lua i Stíl Chicago (17ú heag.)Lewis, C. S. Letters to Malcolm: Chiefly on Prayer. London: G. Bles, 1964.
Lua MLA (8ú heag.)Lewis, C. S. Letters to Malcolm: Chiefly on Prayer. G. Bles, 1964.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.