Sakina R, Astuti RS. Using Duolingo Application In Learning Vocabulary: A Descriptive Qualitative Study At The Fifth Grade Of An Elementary School In Sumedang. Biormatika [Internet]. 2024 Sep. 30 [cited 2024 Dec. 21];10(2):131-45. Available from: http://ejournal.unsub.ac.id/index.php/FKIP/article/view/2091