ชัชวาลขาญชนกิจ เ. 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. J Admin Manag 2021, 11, 37-46.