Muddavo /Pettra, P. ., and Phrakhrupawanpattanabundit. “Thai Society Development with a Thorough Knowledge and Understanding of the Three Planes”. Journal of Graduate Saket Review, vol. 10, no. 2, Aug. 2025, pp. 166-79, https://so03.tci-thaijo.org/index.php/saketreview/article/view/286315.