Thomson, G. D. (1949). An essay on religion. Lawrence & Wishart.
Lua i Stíl Chicago (17ú heag.)Thomson, George Derwent. An Essay on Religion. London: Lawrence & Wishart, 1949.
Lua MLA (8ú heag.)Thomson, George Derwent. An Essay on Religion. Lawrence & Wishart, 1949.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.