MacGregor, Sandy, author
Hikmah, 2007
Buku Teks
Wilson, Jerry S., author
American Management Association;, 2008
eBooks
Muri A. Yusuf, author
Ghalia Indonesia, 2005
Buku Teks
Maltz, Maxwell, 1899-1975, author
Dahara Prize, 2003
Buku Teks
Herry Tjahjono
Gramedia, 2007
Buku Teks