Nagadi، Y.، و Fisher، M. (2011). A Comparison of Profitability for Two Leading Companies in the hotel Industry in the UK and the USA the Inter Continental Hotels Group and Marriott International inc: Business Analysis Report (874N1) (رسالة ماجستير غير منشورة). University of Sussex، برايتون. مسترجع من http://search.mandumah.com/Record/602832
Nagadi، Yazid، و Mark Fisher. "A Comparison of Profitability for Two Leading Companies in the Hotel Industry in the UK and the USA the Inter Continental Hotels Group and Marriott International Inc: Business Analysis Report (874N1)" رسالة ماجستير. University of Sussex، برايتون، 2011. مسترجع من http://search.mandumah.com/Record/602832