HỮU ĐỨCNGUYỄN. “Afeature on Method of Sociology and Social Work Research”. Tạp chí Nghiên cứu Khoa học Công đoàn, no. 13 (January 6, 2020): 25. Accessed March 29, 2026. https://vjol.info.vn/DHCD/article/view/44908.