Arsyad, Safnil, et al. “Citing Others’ Works in Academic Texts: How Non-Native Writers of English Across-Disciplines Use Reporting Verbs and Reporting Signals in Their Research Article Introductions”. Jurnal Arbitrer, vol. 8, no. 1, Apr. 2021, pp. 59-71, doi:10.25077/ar.8.1.59-71.2021.