Great Britain & Great Britain. Foreign Office. (1962). Agreement between the Government of the United Kingdom of Great Britain and Northern Ireland and the Government of the Republic of Sudan for air services between and beyond their respective territories: Khartoum, January 16, 1961. H.M.S.O..
Lua i Stíl Chicago (17ú heag.)Great Britain agus Great Britain. Foreign Office. Agreement Between the Government of the United Kingdom of Great Britain and Northern Ireland and the Government of the Republic of Sudan for Air Services Between and Beyond Their Respective Territories: Khartoum, January 16, 1961. London: H.M.S.O., 1962.
Lua MLA (8ú heag.)Great Britain agus Great Britain. Foreign Office. Agreement Between the Government of the United Kingdom of Great Britain and Northern Ireland and the Government of the Republic of Sudan for Air Services Between and Beyond Their Respective Territories: Khartoum, January 16, 1961. H.M.S.O., 1962.