Northedge , F., & By Grieve , M. J. (1971). A hundred years of international relations. Duckworth.
Citazione stile Chigago Style (17a edizione)Northedge , F.S, e M. J. By Grieve. A Hundred Years of International Relations. London: Duckworth, 1971.
Citatione MLA (9a ed.)Northedge , F.S, e M. J. By Grieve. A Hundred Years of International Relations. Duckworth, 1971.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.