A. Goldsmith and P. Sujaritjan, “AN ANALYSIS OF GRAMMATICAL ERRORS MADE BY 3rd-YEAR THAI BUSINESS ENGLISH UNDERGRADUATES WHEN SPONTANEOUSLY WRITING NARRATIVE AND DESCRIPTIVE PARAGRAPHS”, Int. J. Res. Granthaalayah, vol. 8, no. 8, pp. 75–95, Aug. 2020.