Herry Tjahjono
Gramedia, 2007
Buku Teks
Jones, Jim
Taplinger, 1966
Buku Teks
Wilson, Jerry S., author
American Management Association;, 2008
eBooks
Charitas, Rully, author
Gramedia Pustaka Utama , 2006
Buku Teks
Muri A. Yusuf, author
Ghalia Indonesia, 2005
Buku Teks