Latin America, the United States, and the Inter-American System
Westview Press, 1980
 Buku Teks
Risjord, Norman K.
America a history of the United States
Prentice-Hall, 1985
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America : a celebration of the United States
Rand McNally and Company.
Rand Mcnally & Company, 2006
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Education in the United States of America
Washington U.S. Department of Health, Education, and Welfare 1955
 Buku Teks
The constitution of the United States of America
United States Information Agency, 1987
 Buku Teks