McGrath, A. E. (2008). The open secret: A new vision for natural theology. Blackwell Pub..
Lua i Stíl Chicago (17ú heag.)McGrath, Alister E. The Open Secret: A New Vision for Natural Theology. Malden, MA: Blackwell Pub., 2008.
Lua MLA (9ú heag.)McGrath, Alister E. The Open Secret: A New Vision for Natural Theology. Blackwell Pub., 2008.
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