Thielicke, H. (1977). The hidden question of God. Eerdmans.
Lua i Stíl Chicago (17ú heag.)Thielicke, Helmut. The Hidden Question of God. Grand Rapids: Eerdmans, 1977.
Lua MLA (9ú heag.)Thielicke, Helmut. The Hidden Question of God. Eerdmans, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.