Mubarak, A. M. (2011). A study on the major problem areas in managing the portfolio and their impact on the efficiency of the PPM.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Mubarak, Alia Marjan. A Study on the Major Problem Areas in Managing the Portfolio and Their Impact on the Efficiency of the PPM. 2011.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Mubarak, Alia Marjan. A Study on the Major Problem Areas in Managing the Portfolio and Their Impact on the Efficiency of the PPM. 2011.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.