AYHAN AYDIN; ABDULLAH SELVITOPU; METIN KAYA. Resources Invested in Education and PISA 2015 Results: A Comparative Study . Elementary Education Online, [S. l.], v. 17, n. 3, p. 1283–1301, 2023. Disponível em: https://ilkogretim-online.org/index.php/pub/article/view/746. Acesso em: 27 jul. 2024.