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دليل المستخدم
Bankhar، A. A. A.، و Wells، L. (1996). Public Relations Practitioners' Roles and Commitments in the Professional and Organizational Domains: A Multi-dimensional Approach to Identify the Field's Development and Growth (رسالة دكتوراه غير منشورة). Howard University، واشنطن. مسترجع من http://search.mandumah.com/Record/616336
Bankhar، Abd Allah Ali، و Leory Wells. "Public Relations Practitioners' Roles and Commitments in the Professional and Organizational Domains: A Multi-dimensional Approach to Identify the Field's Development and Growth" رسالة دكتوراه. Howard University، واشنطن، 1996. مسترجع من http://search.mandumah.com/Record/616336