The constitution of the United States of America
United States Information Agency, 1987
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The Pharmacopeia of the United States of America
Board of Trusless, 1960
 Buku Referensi
Stuart, Graham H. (Graham Henry), 1887-, author
Latin America and the United States
Appleton-Century-Crofts, 1955
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Whitaker,Arthur P.
The United States and South America the NorthernRepublics
Harvard University Press, 1948
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The United States of America : a government by the people
The America University, [date of publication not identified]
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Corwin, Edward S., author
The constitution of the United States of America analysis and interpretation
U.S. Government Printing Office, 1953
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