Buzan, B., & Little, R. (2000). International systems in world history: Remaking the study of international relations / Barry Buzan and Richard Little. Oxford University Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Buzan, Barry, و Richard Little. International Systems in World History: Remaking the Study of International Relations / Barry Buzan and Richard Little. Oxford: Oxford University Press, 2000.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Buzan, Barry, و Richard Little. International Systems in World History: Remaking the Study of International Relations / Barry Buzan and Richard Little. Oxford University Press, 2000.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.