Cohn, John M., author
Facet Publishing, 2002
Buku Teks
Cohn, John M., author
Neal-Schuman, 2001
Buku Teks
Stewart, Charles J., author
McGraw-Hill, 2006
Buku Teks
Arthur, Diane, author
American Management Association, 2000
eBooks
Arthur, Diane, author
[American Management Association, ], 2006
eBooks