Schechter, Roger E., author
Thomson West, 2003
Buku Teks
Cambridge University Press, 2004
Buku Teks
Little, Brown and Company, 1975
Buku Teks
Dickey, Albert Venn, 1835-1922, author
Macmillan, 1985
Buku Teks
Bainbridge, David I., author
Pitman , 1993
Buku Teks