Azzan، A.، و Sharyan، A. (2008). Service Quality At The Medicine Faculties Of Sana'a University & The University Of Science And Technology As Perceived By Students In Both Universitiesian: An Alytical Comparative Study. مجلة الباحث الجامعي، ع18 ، 13 - 34. مسترجع من http://search.mandumah.com/Record/954758
Azzan، Ahmed، و Ayid Sharyan. "Service Quality At The Medicine Faculties Of Sana'a University & The University Of Science And Technology As Perceived By Students In Both Universitiesian: An Alytical Comparative Study." مجلة الباحث الجامعي ع18 (2008): 13 - 34. مسترجع من http://search.mandumah.com/Record/954758