Great Britain & Great Britain. Foreign and Commonwealth Office. (1981). Agreement between the Government of the United Kingdom of Great Britain and Northern Ireland and the Government of the democratic Republic of the Sudan on certain commercial debts. Khartoum, 25 August 1980. H.M.S.O..
Παραπομπή σε μορφή Chicago (17η εκδ.)Great Britain και Great Britain. Foreign and Commonwealth Office. Agreement Between the Government of the United Kingdom of Great Britain and Northern Ireland and the Government of the Democratic Republic of the Sudan on Certain Commercial Debts. Khartoum, 25 August 1980. London: H.M.S.O., 1981.
Παραπομπή σε μορφή MLA (8th εκδ.)Great Britain και Great Britain. Foreign and Commonwealth Office. Agreement Between the Government of the United Kingdom of Great Britain and Northern Ireland and the Government of the Democratic Republic of the Sudan on Certain Commercial Debts. Khartoum, 25 August 1980. H.M.S.O., 1981.