Pitt-Rivers, G. H. L. F. (1966). The riddle of the 'Labarum' and the origin of Christian symbols. Allen & Unwin.
Lua i Stíl Chicago (17ú heag.)Pitt-Rivers, George Henry Lane Fox. The Riddle of the 'Labarum' and the Origin of Christian Symbols. London: Allen & Unwin, 1966.
Lua MLA (8ú heag.)Pitt-Rivers, George Henry Lane Fox. The Riddle of the 'Labarum' and the Origin of Christian Symbols. Allen & Unwin, 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.