History of Shepard Award. Journal of the American Pomological Society, [S. l.], v. 46, n. 1, p. 24–26, 1992. DOI: 10.71318/apom.1992.46.1.24. Disponível em: https://journal.americanpomological.org/index.php/jofaps/article/view/1950. Acesso em: 3 feb. 2026.