Purgatorio. Divina comedia de Dante Alighieri - The Ohio Digital Library - OverDrive
Artistic Influence of Dante's "The Divine Comedy" Explored in Exhibition at National Gallery of Art
Dante's Purgatorio – Roman Roads Press
Dante Alighieri. The Divine Comedy. Vol. II (in 2 vols.), Purgatorio. I: Italian Text and Translation. II: Commentary. Tr. with a commentary by Charles S. Singleton. Bollingen Series LXXX. Princeton: Princeton University