Nirandara, S., and N. Inchan. “Relevance of small-size theatre companies in Bangkok in the current era: In spite of difficulties to survive economically, they play a vital role in culture and civilization”. Kasetsart Journal of Social Sciences, vol. 42, no. 3, July 2021, pp. 682–687, https://so04.tci-thaijo.org/index.php/kjss/article/view/253737.