Ross, T. L. (1969). The southern Sudan: Background to civil war.
Lua i Stíl Chicago (17ú heag.)Ross, Tim L. The Southern Sudan: Background to Civil War. [Pittsburgh], 1969.
Lua MLA (8ú heag.)Ross, Tim L. The Southern Sudan: Background to Civil War. 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.