Johnson, John M., author
The Free Press, 1975
Buku Teks
Rudolf Toman, editors
[Springer, ], 2012
eBooks
Silverman, David, author
Sage Publications , 2010
Buku Teks
Gaultney, Jane F., author
California, 2007
Buku Teks
Silverman, David, author
Sage , 2013
Buku Teks