Dake, P., R. Y. Lodo, and A. O. Manek. “Improving English Vocabulary Mastery Through Duolingo Application For Grade 5 At SD Inpres Kayu Putih”. Jurnal Penelitian Ilmu Pendidikan Indonesia, vol. 5, no. 1, Apr. 2026, pp. 840-5, doi:10.31004/jpion.v5i1.900.