Toynbee, A. J. (1951). A studie of history: Abridgement of volumes I-VI by D. C. Somervell. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Toynbee, Arnold J. A Studie of History: Abridgement of Volumes I-VI by D. C. Somervell. New York [u.a.]: Oxford University Press, 1951.
Lua MLA (8ú heag.)Toynbee, Arnold J. A Studie of History: Abridgement of Volumes I-VI by D. C. Somervell. Oxford University Press, 1951.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.