Gerald von Wales & Hagen, J. J. (1979). The jewel of the church. Davis medieval texts and studies.
Citazione stile Chigago Style (17a edizione)Gerald von Wales e John J. Hagen. "The Jewel of the Church." Davis Medieval Texts and Studies 1979.
Citatione MLA (9a ed.)Gerald von Wales e John J. Hagen. "The Jewel of the Church." Davis Medieval Texts and Studies, 1979.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.