Cita APA (7a ed.)

Northedge , F., & By Grieve , M. J. (1971). A hundred years of international relations. Duckworth.

Cita Chicago Style (17a ed.)

Northedge , F.S, y M. J. By Grieve. A Hundred Years of International Relations. London: Duckworth, 1971.

Cita MLA (9a ed.)

Northedge , F.S, y M. J. By Grieve. A Hundred Years of International Relations. Duckworth, 1971.