Al Bahdal، I.، و Jones، C. V. (2011). A Comparative Research Study on the Consumption of Fair Trade Coffee and Non-Fair Trade Coffee in the U.K (رسالة ماجستير غير منشورة). De Montfort University، لستر. مسترجع من http://search.mandumah.com/Record/601724
Al Bahdal، Ibrahim، و Christopher Vaughan Jones. "A Comparative Research Study On the Consumption of Fair Trade Coffee and Non-Fair Trade Coffee in the U.K" رسالة ماجستير. De Montfort University، لستر، 2011. مسترجع من http://search.mandumah.com/Record/601724