Fairbank, John K. (John King), author
Harvard University Press, 1979
Buku Teks
Boyd, Anne Morris, author
H.W. Wilson, 1949
Buku Teks
Myers, Gustavus, author
Random House, 1943
Buku Teks
Rand McNally and Company.
Rand Mcnally & Company, 2006
Buku Teks
Departement of Stetes Based, 1949
Buku Teks