Great Britain & Great Britain. Foreign and Commonwealth Office. (1977). Exchange of notes between the government of the United Kingdom of Great Britain and Northern Ireland and the government of Sierra Leone amending and extending the British Expatriates Supplementation (Sierra Leone) Agreement 1971: (the British Expatriates Supplementation (Sierra Leone) (Continuance) Agreement 1971/1976), Freetown, 8/26 March 1976 (the exchange of notes entered into force on 31 March 1976). H.M.S.O..

Great Britain and Great Britain. Foreign and Commonwealth Office. Exchange of Notes Between the Government of the United Kingdom of Great Britain and Northern Ireland and the Government of Sierra Leone Amending and Extending the British Expatriates Supplementation (Sierra Leone) Agreement 1971: (the British Expatriates Supplementation (Sierra Leone) (Continuance) Agreement 1971/1976), Freetown, 8/26 March 1976 (the Exchange of Notes Entered into Force on 31 March 1976). London: H.M.S.O., 1977.

Great Britain and Great Britain. Foreign and Commonwealth Office. Exchange of Notes Between the Government of the United Kingdom of Great Britain and Northern Ireland and the Government of Sierra Leone Amending and Extending the British Expatriates Supplementation (Sierra Leone) Agreement 1971: (the British Expatriates Supplementation (Sierra Leone) (Continuance) Agreement 1971/1976), Freetown, 8/26 March 1976 (the Exchange of Notes Entered into Force on 31 March 1976). H.M.S.O., 1977.