Sudhinont, J., and J. Sudhinont. “Relations of Syntactic Hierarchy Showing Functions of Proper Nouns in News Headlines about Cruise Ships During the COVID-19 Pandemic”. Academic Journal of Mahamakut Buddhist University Roi Et Campus, vol. 10, no. 2, Nov. 2020, pp. 545-59, https://so01.tci-thaijo.org/index.php/AJMBU/article/view/242235.