Michelle Anggellica Nainggolan, and Dr. Lidia Sandra. “Examining the Interplay Between Critical Period Hypothesis and Attitudinal Dynamics in Second Language Proficiency: A Case Study of Second Language Acquisition Challenges”. Migration Letters 20, no. S9 (November 12, 2023): 1141–1147. Accessed July 23, 2024. https://migrationletters.com/index.php/ml/article/view/4953.