Services, U. S. D. o. S. O. o. M. (1975). Countries of the world and their leaders. Detroit : Gale Research Co..
Citace podle Chicago (17th ed.)Services, United States. Dept. of State. Office of Media. Countries of the World and Their Leaders. Detroit : Gale Research Co., 1975.
Citace podle MLA (9th ed.)Services, United States. Dept. of State. Office of Media. Countries of the World and Their Leaders. Detroit : Gale Research Co., 1975.
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