Anyamanee Watthanarat และ Boon-Anan Phinaitrup. (2022) The development of the competency model in the 21st century to support external assessors' work efficiencies in the vocational education system of Thailand. National Institute of Development Administration:ม.ป.ท.Anyamanee Watthanarat และ Boon-Anan Phinaitrup. 2022. The development of the competency model in the 21st century to support external assessors' work efficiencies in the vocational education system of Thailand. ม.ป.ท.:National Institute of Development Administration;Anyamanee Watthanarat และ Boon-Anan Phinaitrup. The development of the competency model in the 21st century to support external assessors' work efficiencies in the vocational education system of Thailand. ม.ป.ท.:National Institute of Development Administration, 2022. Print.