HOOVER, Tracy S.; SCHOLL, Jan F.; DUNIGAN, Anne H.; MAMONTOVA, Nadezhda. A Historical Review Of Leadership Development In The FFA And 4-H. Journal of Agricultural Education, [S. l.], v. 48, n. 3, p. 100–110, 2007. DOI: 10.5032/jae.2007.03100. Disponível em: https://jae-online.org/index.php/jae/article/view/2041. Acesso em: 20 aug. 2026.