Al Hari، N.، و Taylor، L. (2011). Outsourcing: Has it Become a Vital Strategic Option For Companies and What Effect does it have on The Global Economy (رسالة ماجستير غير منشورة). Middlesex University، لندن. مسترجع من http://search.mandumah.com/Record/687507
Al Hari، Najla، و Leisle Taylor. "Outsourcing: Has It Become a Vital Strategic Option For Companies and What Effect Does It Have On The Global Economy" رسالة ماجستير. Middlesex University، لندن، 2011. مسترجع من http://search.mandumah.com/Record/687507