Aziz، W. M. (2013). Development of Food and Beverage Waiters Performance in the Kingdom of Saudi Arabia Hotels: Application to Main Restaurants in first Class A Hotels in Riyadh City. مجلة اتحاد الجامعات العربية للسياحة والضيافة، مج10, ع1 ، 231 - 242. مسترجع من http://search.mandumah.com/Record/841267
Aziz، Wael Mahmoud. "Development of Food and Beverage Waiters Performance in the Kingdom of Saudi Arabia Hotels: Application to Main Restaurants in first Class A Hotels in Riyadh City." مجلة اتحاد الجامعات العربية للسياحة والضيافة مج10, ع1 (2013): 231 - 242. مسترجع من http://search.mandumah.com/Record/841267