Ratu Shania Nazjwa Salsabilla, et al. “The Effect Of Using Duolingo On English Writing For EFL University Students”. PESHUM : Jurnal Pendidikan, Sosial Dan Humaniora, vol. 4, no. 1, Dec. 2024, pp. 238-44, doi:10.56799/peshum.v4i1.6662.