Punya, Supakij. 2020. “A Study of the Related Between Four Sublime States of Mind and Spiritual Well-Being of Chulamani Vocational College in Srisaket Province”. Journal of MCU Humanities Review 5 (2). ิิิBankok, Thailand:47-60. https://so03.tci-thaijo.org/index.php/human/article/view/225870.