Eskilson, Stephen
Laurence King , 2012
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Gomez-Palacio, Bryony
Page one publishing pte ltd, 2009
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Meggs, Philip B.
John Wiley & Sons, 1998
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edited for the Society of American Historians by Courtlandt Canby & Nancy E. Gross
New American Library, 1954
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Revill, J.C.
Longman, 1959
Buku Teks SO