Vivian, John, author
Pearson and AB, 2007
Buku Teks
editor, Joseph F. Littell
McDougal, Littel and Company, 1976
Buku Teks
Unesco Press, 1976
Buku Teks
Wilson, Stan Le Roy, author
McGraw-Hill, 1995
Buku Teks
O`hara, Robert C.
Random House , 1961
Buku Teks