Case studies in American government the inter-University case program edited by and
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Holsti, Ole R.
American leadership in World affairs Vietnam and the breakdown of consensus and
Boston Allen & Unwin 1984
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Reviews in American History
Baltimore : Johns Hopkins University Press
Majalah, Jurnal, Buletin
Griffith, Ernest S.
The America system of goverment
London Methuen & Co. 1967,
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Mathias, L.L.
Etdeckung Amerikas anno 1953
Hamburg Rowohlt 1953
Buku Teks