Gere, Anne Ruggles
Macmillan, 1985
Buku Teks
Rosenberg, Vivian M., author
Random House, 1989
Buku Teks
Ewald, Helen Rothschild
Charles E. Merrill Publishing Company, 1983
Buku Teks
Goddard, Ken, author
The Bath Press, 1995
Buku Teks
Dawe, Charles W.
Little, Brown and Company, c1984
Buku Teks