Mostafa, A. (2012). The Key Factor for Rapid Change in Cultures and Traditions; and the Proof of the Emergence of "The Marketing Opportunity Life-Cycle"Theory.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Mostafa, Ahmad. The Key Factor for Rapid Change in Cultures and Traditions; and the Proof of the Emergence of "The Marketing Opportunity Life-Cycle"Theory. 2012.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Mostafa, Ahmad. The Key Factor for Rapid Change in Cultures and Traditions; and the Proof of the Emergence of "The Marketing Opportunity Life-Cycle"Theory. 2012.
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