XU, Shuya. Research on the Influence of Shadow Education on the Performance of Different Subjects in Junior High School: Empirical Analysis based on CEPS ( 2013-2014 ). International Journal of Social Sciences and Public Administration, U.K., v. 5, n. 3, p. 81–89, 2024. DOI: 10.62051/ijsspa.v5n3.12. Disponível em: https://wepub.org/index.php/IJSSPA/article/view/4980. Acesso em: 24 jul. 2026.