Mellya Miranda Putri, Mulyadi Mulyadi, and Gustianingsih Gustianingsih. 2024. “The Structure of Interrogative Sentences in Langkat Malay: An Analysis of X-Bar Theory”. RETORIKA: Jurnal Ilmu Bahasa 10 (2), 585-93. https://doi.org/10.55637/jr.10.2.9296.585-593.