ププサ
Carman, Tim. "Perfect Pupusas Require a Mastery of Masa". The Washington Post, 2012.
Lawson, Susan C. "Latin LESSONS". Indianapolis Monthly, vol. 25, no. 10, 2002, pp. 164.
Nickles, Greg. "The Flavors of El Salvador". El Salvador: The People & Culture, 2002, pp. 28-29.
Planet, L.; Staff, Lonely Planet Publications (2012). The World's Best Street Food: Where to Find It and How to Make It. Lonely Planet Publications. p. 137. ISBN 978-1-74321-664-4. https://books.google.com/books?id=Wat9BAAAQBAJ&pg=PT137 2016年7月30日閲覧。
Scherer, Jane. "Pupusas". Faces, vol. 15, no. 3, November 1998, p. 19.