Veeraraghavan, Vimala, author
Sage, 2002
Buku Teks
Lawrwncw Erlbaum Associates, Inc, 2005
Buku Teks
edited by Robert T. Woods
John Wiley & Sons, 1999
Buku Teks
Taylor, Ronald L., author
Allyn and Bacon, 2003
Buku Teks
Cohen, Ronald Jay, author
Mayfield Publishing, 2006
Buku Teks