Buzan, B., & Little, R. (2000). International systems in world history: Remaking the study of international relations. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Buzan, Barry, agus Richard Little. International Systems in World History: Remaking the Study of International Relations. Oxford: Oxford University Press, 2000.
Lua MLA (9ú heag.)Buzan, Barry, agus Richard Little. International Systems in World History: Remaking the Study of International Relations. Oxford University Press, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.