RACHMATIA; NURHAEDA GAILELA. THE EFFECT OF ENGLISH AS AN OPTIONAL SUBJECT AT ELEMENTARY SCHOOL TOWARDS JUNIOR HIGH SCHOOL ENGLISH PRODUCTIVE SKILL (A Study at SMPN 26 Kota Serang). BEGIBUNG: Jurnal Penelitian Multidisiplin, [S. l.], v. 3, n. 1, p. 42–52, 2025. DOI: 10.62667/begibung.v3i1.145. Disponível em: https://berugakbaca.org/index.php/begibung/article/view/145. Acesso em: 13 nov. 2025.