Reza Artha Mevia, Ahmad Thoyyib Shofi and Lailatul Masruroh (2024) “THE EFFECT OF USING DUOLINGO APPLICATION AS TEACHING MEDIA TO IMPROVE VOCABULARY MASTERY OF ELEVENTH GRADERS”, J-Shelves of Indragiri (JSI), 6(2), pp. 19–33. doi: 10.61672/jsi.v6i2.2784.