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دليل المستخدم
Yousef، B.، و Harrald، J. R. (2002). Research Towards Persuasive Web Sites: An Investigation of the Effects of Source Credibility and Message Content on the Internet Persuasiveness (رسالة دكتوراه غير منشورة). George Washington University، واشنطن. مسترجع من http://search.mandumah.com/Record/611070
Yousef، Basma، و John Richard Harrald. "Research Towards Persuasive Web Sites: An Investigation of the Effects of Source Credibility and Message Content On the Internet Persuasiveness" رسالة دكتوراه. George Washington University، واشنطن، 2002. مسترجع من http://search.mandumah.com/Record/611070