Dalimunte, A. A., and I. Pramoolsook. “Genres Classification and Generic Structures in the English Language Textbooks of Economics and Islamic Economics in an Indonesian University”. LEARN Journal: Language Education and Acquisition Research Network, vol. 13, no. 1, Jan. 2020, pp. 1-19, https://so04.tci-thaijo.org/index.php/LEARN/article/view/237778.