University of North Carolina at Chapel Hill. Institute for Academic and Professional Leadership, ebrary, Inc, & Sax, B. (2008). On the horizon. Emerald.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)University of North Carolina at Chapel Hill. Institute for Academic and Professional Leadership, Inc ebrary, و Boria Sax. On the Horizon. [Bradford, England]: Emerald, 2008.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)University of North Carolina at Chapel Hill. Institute for Academic and Professional Leadership, et al. On the Horizon. Emerald, 2008.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.