“Outcome Assessment of General Education 21st Century Competency Skills: Close the Loop Efforts in the United States”. Journal of Contemporary Educational Policies and Practices 5, no. 1 (Tháng Ba 30, 2021): 52–63. Truy cập Tháng Tư 3, 2026. https://ojs35.mpos.io.vn/index.php/journal/article/view/45.