Salzman, Jason
Westview Press, 1998
Buku Teks
Kaniss, Phyllis, author
The University of Chicago Press , 1991
Buku Teks
Bryant, Jennings, author
McGraw-Hill, 2002
Buku Teks
Simmons, Robert E
Longmann, 1990
Buku Teks
Alison Alexander, Jarice Hanson, editor
McGraw-Hill/Dushkin, 2001
Buku Teks