Emelia, Tengku Winona, et al. “THE USE OF THE DUOLINGO GUESSING GAME APPLICATION IN TEACHING SPEAKING ABILITY TOWARD 8TH - STUDENTS”. JGK (Jurnal Guru Kita), vol. 7, no. 1, Dec. 2022, pp. 173-80, doi:10.24114/jgk.v7i1.43421.