The Influence of English Ability on the Performance of the Secretary Director at Nunukan State Polytechnic. International Journal of Sustainable Applied Sciences (IJSAS), [S. l.], v. 1, n. 6, p. 865–880, 2024. Disponível em: https://penerbitjurnalinternasional.com/index.php/ijsas/article/view/564.. Acesso em: 13 oct. 2025.