Thepa, Phramaha Chakrapol Acharashubho. “Indispensability Perspective of Enlightenment Factors”. Journal of Dhamma for Life 27, no. 4 (December 10, 2021): 26–36. accessed May 25, 2025. https://so08.tci-thaijo.org/index.php/dhammalife/article/view/1140.