Leong, N. L. M. (1999). Project managers and their effective management of cost, schedule and quality in projects.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Leong, Nancy Li Ming. Project Managers and Their Effective Management of Cost, Schedule and Quality in Projects. 1999.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Leong, Nancy Li Ming. Project Managers and Their Effective Management of Cost, Schedule and Quality in Projects. 1999.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.