Ball, M. M., & Killough, H. B. (1956). International relations. Ronald Press Co.
Lua i Stíl Chicago (17ú heag.)Ball, Mary Margaret, agus Hugh Baxter Killough. International Relations. New York: Ronald Press Co, 1956.
Lua MLA (9ú heag.)Ball, Mary Margaret, agus Hugh Baxter Killough. International Relations. Ronald Press Co, 1956.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.