SIEBEMORGAN, Ryan P.; EDGAR, Don W.; CARTER, Vinson R.; JOHNSON, Donald M. An Evaluation of Teaching Methods Based on Cognitive Achievement. Journal of Agricultural Systems, Technology, and Management, [S. l.], v. 27, n. 1, 2016. Disponível em: https://jastm.org/index.php/jastm/article/view/11827. Acesso em: 19 may. 2026.