Schneider, David Murray, 1918-, author
Prentice-Hall, 1968
Buku Teks
Franklin, Sarah, author
Routledge, 1997
Buku Teks
New york, Burt Franklin and company, Inc
Majalah, Jurnal, Buletin
Hirsch, Eric Donald, Jr., author
Schwartz Publishing, 1988
Buku Teks
Gelernter, Mark, author
Manchester University Press, 2001
Buku Teks