Jitae, samart. (2021). Predictive Factors of Older farmer’s Quality of Life in Off-season Longan Production, Ban Hong District, Lamphun Province. Research and Development Journal Sisaket Rajabhat University, 8(2), 54–65. retrieved from https://so01.tci-thaijo.org/index.php/sskru-resarch/article/view/252629