Heide, G. (2012). Timeless truth in the hands of history: A short history of system in theology. James Clarke & Co..
Lua i Stíl Chicago (17ú heag.)Heide, Gale. Timeless Truth in the Hands of History: A Short History of System in Theology. Cambridge, U.K.: James Clarke & Co., 2012.
Lua MLA (9ú heag.)Heide, Gale. Timeless Truth in the Hands of History: A Short History of System in Theology. James Clarke & Co., 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.