Fawaida, U., S. Sudarmin, S. Saptono, and S. Ridlo. “Pocketbook; Foreign Speakers; Indonesian Language; Culture”. International Conference on Science, Education, and Technology, vol. 9, no. 1, Sept. 2023, pp. 782-90, https://proceeding.unnes.ac.id/ISET/article/view/2510.