Arjulayana, arjulayana, Zainal Rafli, and Siti Ansoriyah. “Understanding Natural Approach for Teaching Productive Skills”. ELS Journal on Interdisciplinary Studies in Humanities 1, no. 2 (June 26, 2018): 232–239. Accessed March 31, 2025. http://journal.unhas.ac.id/index.php/jish/article/view/4355.