Nareerat Tabtongkul น. ท., Kanit Kheovichai ค. เ., and อุ่นอารมย์เลิศ ธ., “The Development of Activities Enhance Characteristics Model Based on Concept Philosophy of Sufficiency Economy for Undergraduate Students”, Journaldtc, vol. 12, no. 2, pp. 335–353, May 2018.