Datu, Yerly Arnold. “ADULT LEARNERS’ LANGUAGE ACQUISITION: A CASE STUDY OF IN-HOUSE TRAINING OF COMPANY ‘X’ JAKARTA”. Jurnal Bisnis Terapan 8, no. 1 (June 27, 2024): 1 - 12. Accessed July 3, 2024. https://journal.ubaya.ac.id/index.php/JIBT/article/view/6412.