Dhiyaushshafa, Dendeu Najla, and Otong Setiawan Djuharie. “The Use of Mobile Applications Such As Duolingo to Support Self-Directed English Learning”. Sintaksis : Publikasi Para Ahli Bahasa Dan Sastra Inggris, vol. 3, no. 4, June 2025, pp. 165-73, doi:10.61132/sintaksis.v3i4.1924.