Juwanda , Juwanda, Ida Zulaeha, Hari Bakti Mardikantoro, and Tommi Yuniawan. “Characteristics of Indonesian Teaching Materials for Foreign Speakers for the Business Communication Purposes”. International Conference on Science, Education, and Technology 9, no. 1 (September 8, 2023): 389–395. Accessed May 15, 2024. https://proceeding.unnes.ac.id/ISET/article/view/2449.