Wu, Jiajian. “The Required Reading for Entering Systemic Functional Linguistics: A Review of Systemic Functional Grammar: A First Step into the Theory”. International Journal of English Literature and Social Sciences (IJELS) 8, no. 3 (May 20, 2023). Accessed July 22, 2024. https://journal-repository.com/index.php/ijels/article/view/6320.