Nuriza Johan, A., J. Mujiyanto, S. Wuli Fitriati, and R. Hartono. “The Analysis of Speech Acts in “English for Nusantara“ Textbook”. International Conference on Science, Education, and Technology, vol. 8, no. 1, Oct. 2022, pp. 137-71, https://proceeding.unnes.ac.id/ISET/article/view/1740.