PARK, S. Identifying Key Linguistic Variables of Second Language Speaking Proficiency Using Principal Component Analysis. Forum for Linguistic Studies, [S. l.], v. 6, n. 6, p. 623–633, 2024. DOI: 10.30564/fls.v6i6.7629. Disponível em: https://journals.bilpubgroup.com/index.php/fls/article/view/7629. Acesso em: 6 feb. 2025.