Berges, Steve, author
American Management Association, 2006
eBooks
Cutaia, Susan, author
American Management Association, 2007
eBooks
Beirne, Mike, author
American Management Association, 2006
eBooks
Baker, Ross K., author
Free Press, 1980
Buku Teks
Moulton, Harold G., author
Brookings Institution, 1935
Buku Teks