United States. Central Intelligence Agency. (1992). Handbook of the nations: A brief guide to the economy, government, land, demographics, communications, transportation systems, and national defense establishment of each of 264 entities of the world (12th ed.). Gale Research.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United States. Central Intelligence Agency. Handbook of the Nations: A Brief Guide to the Economy, Government, Land, Demographics, Communications, Transportation Systems, and National Defense Establishment of Each of 264 Entities of the World. 12th ed. Detroit, Mich: Gale Research, 1992.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)United States. Central Intelligence Agency. Handbook of the Nations: A Brief Guide to the Economy, Government, Land, Demographics, Communications, Transportation Systems, and National Defense Establishment of Each of 264 Entities of the World. 12th ed. Gale Research, 1992.