Sung-Sik Yoo, Jun-Hyeok Seo, Soo-Yong Park, Dong-Hyung Lee 2023. Development Plan of Private Vocational Competency Development Training Institutes. Journal for ReAttach Therapy and Developmental Diversities. 6, 9s(2) (Aug. 2023), 606–617. DOI:https://doi.org/10.67145/jrtdd.v6i9s(2).1290.