Sinaga, Reza Sanjaya, Sepriyana Sagala, and Dumaris E Silalahi. “Sustainable Assessment in Improving English Proficiency”. Innovative: Journal Of Social Science Research 5, no. 1 (January 20, 2025): 1922–1933. Accessed June 14, 2026. https://j-innovative.org/index.php/Innovative/article/view/17830.