Trisnawati, N., Rahmawati, F., Wulandari, S. S., Wibowo, A. H., & Raji-Ellams, Z. B. (2025). Development of Student Textbooks and Lecture Guides for Business and Office English Courses based on Audio. International Journal of Emerging Research and Review, 4(1), 000158. https://doi.org/10.56707/ijoerar.v4i1.158