- Dant Alighieri (trans. Mark Musa). The Divine Comedy II: Purgatory. New York City: Penguin Books, 1985.
- Bookbento. "Book Bento Box." Instagram. 03/28/2021. <https://www.instagram.com/bookbento/>.
- Lisa Highfill, Rachel Kloos, and Holly Clark. "Spark ShortStory #BookBento." 03/28/2021. <https://docs.google.com/presentation/d/1JWmMsh8i32coG5ym7ChbzONiMa3gwTCD3-f0RTxFU50/edit>.
- "Painting of Purgatory, 1454." British Library. 03/28/2021. <https://www.bl.uk/collection-items/painting-of-purgatory-1454#>.
- Vittorio Montemaggi, Matthew Treherne, and Abi Rowson. "Purgatorio - Dante's...
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