The World book encyclopedia
World Book, 1992
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Ingo-Eric M.
Book trade of the world III
London : k.C. Saur Munchen, 1981,
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The world book dictionary
edited by Clarence L. Barnhart and Robert K. Barnhart
World Book-Childcraft International, 1978
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Barnes, Harry Elmer, author
The American way of life : an introduction to the study of contemporary society
Prentice-Hall, 1950
 Buku Teks
Liberalization in the developing world: institutional economic changes in Latin America, Africa and Asia/editor by Alex E. Fernandez Jilberto and Andre Mommen
Routledge, 1996
 Buku Teks
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