The London Hospital / UDO, 1972
Buku Teks
Buck, John R., author
Prentice-Hall, 2002
Buku Teks
Brandon/Systems Press, 1970
Buku Teks
Solomon, Irving I., author
New American Library , 1968
Buku Teks
Katzan, Harry, Jr., author
Van Nostrand Remhald, 1973
Buku Teks