1. Strengthening or Weakening Claims in Academic Knowledge Construction: A Comparative Study of Hedges and Boosters in Postgraduate Academic Writing
2. The Use of Meta-discourse An Analysis of Interactive and Interactional Markers in English Short Stories as a Type of Literary Genre
3. Alward, A. S., Mooi, C. C., Jamilah, S., & Bidin, B. (2012). Hedges and boosters in the Yemeni EFL undergraduates' persuasive essay: An empirical study. The Internet Journal of Language, Culture and Society, 34, 1-12.
4. Anthony, L. (2022). AntConc (4.0.11) [Computer Software]. In Waseda University. https://www.laurenceanthony.net/software
5. Boicu, R. (2007). Modal verbs and politeness strategies in political discourse. Analele Universităţii din Bucureşti 17(1), 15-28. https://mpra.ub.uni-muenchen.de/id/eprint/45913