Pettit, William, and Candice Smith Corby. 2020. “The Origin of Resources: Sustainable and Experiential Learning in Italy.” The Journal of Sustainability Education, April.
Amato, Serafino, William Pettit, and Antonio Capaccio. 2017. Landscapes. Edited by Francesca Capriccioli. https://jculibrary.on.worldcat.org/oclc/1078782883.