Painter, Clare
OXford University Press, 1989
Buku Teks
Burris, Jon
Foreign Languages Press, 2010
Buku Referensi
Burris, Jon
Foreign Languages Press, 2010
Buku Teks
Cody, William J.
Prentice-Hall, 1980
Buku Teks
Painter, Sidney
Alfred A. Knopf, 1961
Buku Teks