Al-Mahi، M. A. A. (2021). The Impact of the Internal Audit for Quality Management System on Improving the Quality: Management System in Companies that Obtained the ISO 9001/2015 Certificate in the Energy Sector in Sudan. المجلة العربية للنشر العلمي، ع37 ، 1 - 18. مسترجع من http://search.mandumah.com/Record/1435938
Al-Mahi، Mohammed Al-Amin Ahmed. "The Impact of the Internal Audit for Quality Management System On Improving the Quality: Management System in Companies That Obtained the ISO 9001/2015 Certificate in the Energy Sector in Sudan." المجلة العربية للنشر العلمي ع37 (2021): 1 - 18. مسترجع من http://search.mandumah.com/Record/1435938