Michelle Anggellica Nainggolan and Dr. Lidia Sandra 2023. 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, S9 (Nov. 2023), 1141–1147. DOI:https://doi.org/10.59670/ml.v20iS9.4953.