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دليل المستخدم
Al Shumaimeri، A.، و Ennew، C. (1998). DIRECT MARKETING: A TRANSACTION COST BASED ANALYSIS OF DIRECT MARKETING AS A CHANNEL OF DISTRIBUTION IN SAUDI ARABIA (رسالة دكتوراه غير منشورة). University of Nottingham، نوتنغهام. مسترجع من http://search.mandumah.com/Record/597939
Al Shumaimeri، Ahmed، و Christine Ennew. "DIRECT MARKETING: A TRANSACTION COST BASED ANALYSIS OF DIRECT MARKETING AS A CHANNEL OF DISTRIBUTION IN SAUDI ARABIA" رسالة دكتوراه. University of Nottingham، نوتنغهام، 1998. مسترجع من http://search.mandumah.com/Record/597939