Tschudin, Verena, author
Butterworth-Heinemann , 2007
Buku Teks
Thompson, Joyce Beebe, author
Macmillan, 1981
Buku Teks
Thompson, Ian E., author
Churcill Livingstone, 1988
Buku Teks
Bandman, Elsie L., author
Prentice-Hall, 1995
Buku Teks
Curtin, Leah
Leah Curtin , 1982
Buku Teks