Noorian, M., and R. Biria. “Interpersonal Metadiscourse in Persuasive Journalism: A Study of Texts by American and Iranian EFL Columnists”. Journal of Modern Languages, vol. 20, no. 1, June 2017, pp. 64-79, https://jml.um.edu.my/index.php/JML/article/view/3374.