TERRY, Bryan; HARDER, Amy; PRACHT, Dale. Understanding the Value of Volunteer Involvement. Journal of Agricultural Education, [S. l.], v. 52, n. 2, p. 118–127, 2011. DOI: 10.5032/jae.2011.02118. Disponível em: https://jae-online.org/index.php/jae/article/view/1859. Acesso em: 14 jul. 2024.