LIANG, G.; ZHANG, Y.; HUANG, H.; QIAO, Z. Teacher Incentive Pay Programs in the United States: Union Influence and District Characteristics. International Journal of Education Policy and Leadership, [S. l.], v. 10, n. 3, 2015. DOI: 10.22230/ijepl.2015v10n3a491. Disponível em: https://ijepl.journals.publicknowledgeproject.org/index.php/ijepl/article/view/491. Acesso em: 4 may. 2026.