HOWARD, N.-J. A Theoretical Examination of Shadow Education in South Korea. International Journal of Asian Education, South Sulawesi, Indonesia, v. 2, n. 3, p. 429–438, 2021. DOI: 10.46966/ijae.v2i3.229. Disponível em: https://ijae.journal-asia.education/index.php/data/article/view/229. Acesso em: 26 aug. 2026.