ELDAWI AHMED, Eihab Abdel Rahim; 						MAHFOUZ, Mohamed Salih; 						OMER FDUL, Isam.
 How to determine Sample Size: the Design of Sample Size in Health Studies.
<strong>مجلة الجزيرة للعلوم الصحية</strong>, [S.l.], v. 7, n. 2, june 2011.
ISSN 1810-5386. متوفر في: &lt;<a href="http://journals.uofg.edu.sd/index.php/gjhs/article/view/321" target="_new">http://journals.uofg.edu.sd/index.php/gjhs/article/view/321</a>&gt;. تأريخ الوصول: 30 june 2026.