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 the Republic of Guyana concerning officers designated by the government of the United Kingdom in the service of the government of Guyana: (the Overseas Service (Guyana) (Continuance) Agreement 1977/81) : Georgetown, 31 March 1977 (the agreement entered into force on 1 April 1977). Her Majesty's Stationery Office.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)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 the Republic of Guyana Concerning Officers Designated by the Government of the United Kingdom in the Service of the Government of Guyana: (the Overseas Service (Guyana) (Continuance) Agreement 1977/81) : Georgetown, 31 March 1977 (the Agreement Entered into Force on 1 April 1977). London: Her Majesty's Stationery Office, 1977.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)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 the Republic of Guyana Concerning Officers Designated by the Government of the United Kingdom in the Service of the Government of Guyana: (the Overseas Service (Guyana) (Continuance) Agreement 1977/81) : Georgetown, 31 March 1977 (the Agreement Entered into Force on 1 April 1977). Her Majesty's Stationery Office, 1977.