Chairum, P., Suwanboon, P. and Kongmian, K. 2023. SUFFICIENCY ECONOMY APPLICATION FOR IMPROVING THE QUALITY OF LIFE TO RAISE INCOME AND THE WELL-BEING OF THE ELDERLY FAMILIES IN PHETCHABURI PROVINCE. Journal of MCU Phetchaburi Review . 5, 2 (Jan. 2023), หน้า 83 – 99.