Shamsudin, M. F., A. Abu Hassim, and Sanusi Abd Manaf. “Mastering Probability and Non-Probability Methods for Accurate Research Insights”. Journal of Postgraduate Current Business Research , Vol. 9, no. 1, Sept. 2024, pp. 38-53, https://abrn.asia/ojs/index.php/jpcbr/article/view/157.