CROWDEN, James. Joan Morgan: The Book of Pears: The Definitive History and Guide to over 500 Varieties. Petits Propos Culinaires, Sheffield, United Kingdom, p. 123–124, 2016. DOI: 10.1558/ppc.28182. Disponível em: https://journal.equinoxpub.com/ppc/article/view/28182. Acesso em: 16 apr. 2025.