Rachmatia, and 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 3, no. 1 (April 19, 2025): 42–52. Accessed November 13, 2025. https://berugakbaca.org/index.php/begibung/article/view/145.