Mei Tri Wahyu Saputri 2024. Duolingo Application as A Learning Aid to Enhance Vocabulary Proficiency in Procedure Texts at Junior High School. Jurnal Yudistira : Publikasi Riset Ilmu Pendidikan dan Bahasa. 2, 4 (Oct. 2024), 533–540. DOI:https://doi.org/10.61132/yudistira.v2i4.1317.