دلالة هيفاء. “Statistical Sampling in the Practical Field of Research Analytical Study of a Sample of Master`s Theses in the Faculty of Education at Tishreen University”. Tishreen University Journal- Economic and Legal Sciences Series 44, no. 4 (September 21, 2022): 125–137. Accessed May 12, 2024. https://journal.tishreen.edu.sy/index.php/econlaw/article/view/12513.