Matanari, Desna Uli, Tengku Silvana Sinar, Yulia Pradinda, Abigail Putri Chrissantha Tarigan, and Hani Firlyali Hasan. 2025. “An Analysis of Comparison on Observation Permission Letters in Selected Departments at USU: A Critical Genre Analysis”. Lexeme : Journal of Linguistics and Applied Linguistics 7 (1):143-52. https://doi.org/10.32493/ljlal.v7i1.46320.