“Procedures For Selecting Sample Unit  in Field Social Research(Study Content Analysis of Doctoral Theses in Sociology Between1992- 2012)”, مجلة الآداب و العلوم الإنسانية, vol. 40, no. 4, Dec. 2024, Accessed: Jun. 18, 2026. [Online]. Available: https://journal.damascusuniversity.edu.sy/index.php/humj/article/view/13867