Trisnawati, Novi, Fitriana Rahmawati, Siti Sri Wulandari, Amiruddin Hadi Wibowo, and Zaynab Bolanle Raji-Ellams. 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.