RAHAYU, Pipit. THE ROLE OF ENGLISH VAGANZA COMPETITION 2016 ON CHALLENGING IMPROMTU SPEECH . JEE (Journal of English Education), [S. l.], v. 3, n. 1, p. 31–40, 2018. Disponível em: https://journal.upp.ac.id/index.php/JEE/article/view/504. Acesso em: 4 may. 2024.