Northedge, F. S., & Grieve, M. (1971). A hundred years of international relations. Praeger.
Lua i Stíl Chicago (17ú heag.)Northedge, F. S., agus M.J Grieve. A Hundred Years of International Relations. New York: Praeger, 1971.
Lua MLA (9ú heag.)Northedge, F. S., agus M.J Grieve. A Hundred Years of International Relations. Praeger, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.