unknown. (2020). FACTORS AFFECTING CONTINGENCY AMOUNT IN BIDDING FOR LARGE CONSTRUCTION PROJECTS: CONTRACTORS PERSPECTIVE.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)unknown. FACTORS AFFECTING CONTINGENCY AMOUNT IN BIDDING FOR LARGE CONSTRUCTION PROJECTS: CONTRACTORS PERSPECTIVE. 2020.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)unknown. FACTORS AFFECTING CONTINGENCY AMOUNT IN BIDDING FOR LARGE CONSTRUCTION PROJECTS: CONTRACTORS PERSPECTIVE. 2020.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.