Suryana, Agus, Maruf Akbar, and Achmad Ridwan. “Development of a Student Bullying Scale Using the Rasch Model”. KnE Social Sciences 4, no. 14 (November 11, 2020): 254–262. Accessed June 25, 2021. https://knepublishing.com/index.php/KnE-Social/article/view/7883.