ทวีหิรัญรัฐกิจ ณ. 2018. The Relationship of PersonalFactors Affecting in Cup Lump Production Condition of Thasae Agricultural Cooperative, AmphoeThachang, SuratthaniProvince. Journal of Management Sciences Suratthani Rajabhat University. 5, 2 (Oct. 2018), 205–232.