Foster, R. (1992). Prayer: Finding the heart's true home. Hodder & Stoughton.
Lua i Stíl Chicago (17ú heag.)Foster, Richard. Prayer: Finding the Heart's True Home. London: Hodder & Stoughton, 1992.
Lua MLA (9ú heag.)Foster, Richard. Prayer: Finding the Heart's True Home. Hodder & Stoughton, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.