SETYA PERTIWI, YOSI. Reinforcement in Speaking Class to Motivate Students. RETAIN : Journal of Research in English Language Teaching, [S. l.], v. 7, n. 2, 2019. Disponível em: https://ejournal.unesa.ac.id/index.php/retain/article/view/29285. Acesso em: 5 jul. 2025.