دلالة ه. “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, vol. 44, no. 4, Sept. 2022, pp. 125-37, https://journal.tishreen.edu.sy/index.php/econlaw/article/view/12513.