LaFeber, Walter, author
McGraw-Hill, 2008
Buku Teks
Luard, Evan
St. Martin's Press, 1979
Buku Teks
Steel, Ronald
The VIking Press, 1968
Buku Teks
Garten, Jeffrey E
Times Books, [1992, 1992.]
Buku Teks
Roskin, Michael G., author
Pearson/Prentice Hall, 2004
Buku Teks