Sirikit, Ruangdech, Manida Choptham, Panwasn Mahalawalert, Navarin Tagontong, and Supa Apinyapibal. “An Investigation of Differential Item Functioning and Differential Test Functioning Of Swusat During 2010-2013”. Scholar: Human Sciences 8, no. 2 (January 16, 2017). Accessed May 24, 2025. https://assumptionjournal.au.edu/index.php/Scholar/article/view/2514.