Eka Tri Wulandari. The Research on A Fifth-Years Old Child with His Kinds of Language (Foreign Language, Mother Tongue, and Second Language): A Case Study on Muhammad Joko Purnomo. aj [Internet]. 2024 Sep. 30 [cited 2026 Aug. 15];6(3):22-9. Available from: https://attractivejournal.com/index.php/aj/article/view/1189