Cita APA (7a ed.)

Buzan, B., & Little, R. (2000). International systems in world history: Remaking the study of international relations. Oxford University press.

Cita Chicago Style (17a ed.)

Buzan, Barry, y Richard Little. International Systems in World History: Remaking the Study of International Relations. Oxford [etc.]: Oxford University press, 2000.

Cita MLA (9a ed.)

Buzan, Barry, y Richard Little. International Systems in World History: Remaking the Study of International Relations. Oxford University press, 2000.