LAWVER. DAVID E.; LEE, Jasper S. Comparison Of Members And Non-Members Of Professional Organizations For Vocational Agriculture Teachers. Journal of Agricultural Education, [S. l.], v. 31, n. 4, p. 39–45, 1990. DOI: 10.5032/jae.1990.04039. Disponível em: https://jae-online.org/index.php/jae/article/view/2204. Acesso em: 23 jun. 2026.