Nassier، A.، و Grant، S. (2009). Implementing Supply Chain "Best Practices" in the Bitumen Manufacturing Industry Purchases and Buyer Supplier Relations in Saudi Arabia (رسالة ماجستير غير منشورة). Brunel University، لندن. مسترجع من http://search.mandumah.com/Record/685928
Nassier، Ahmed، و Susan Grant. "Implementing Supply Chain "Best Practices" in the Bitumen Manufacturing Industry Purchases and Buyer Supplier Relations in Saudi Arabia" رسالة ماجستير. Brunel University، لندن، 2009. مسترجع من http://search.mandumah.com/Record/685928