Houghton Miffiln, 1980
Buku Teks
Quible, Zone K.
Prentice Hall International,inc, 1996
Buku Teks
Locker, Kitty O., author
McGraw-Hill, 2007
Buku Teks
Ewald, Helen Rothschild, author
Prentice-Hall International, 1997
Buku Teks
Dumont, Raymond A., author
Little, Brown, 1985
Buku Teks