ชัชวาลขาญชนกิจ เพ็ชราภรณ์. “the Influence Factors Of A Participation And Attitude On The Sufficiency Economy Philosophy Of The Elderly Life Quality In Chumphon Province: Influence Factors Of A Participation And Attitude On The Sufficiency Economy Philosophy Of The Elderly Life Quality In Chumphon Province”. Journal of KMITL Business school 11, no. 2 (September 23, 2021): 37–46. Accessed July 4, 2022. https://so02.tci-thaijo.org/index.php/fam/article/view/249721.