Sami, W., Alrukban, M. O., Waqas, T., Asad, M. R., & Afzal, K. (2018). SAMPLE SIZE DETERMINATION IN HEALTH RESEARCH. Journal of Ayub Medical College Abbottabad, 30(2), 308–311. Retrieved from https://jamc.ayubmed.edu.pk/index.php/jamc/article/view/5137