Hanan, Mack
AMACOM , 1977
Buku Teks
Scott, Bill, author
Pustaka Binaman Pressindo, 1991
Buku Teks
Leritz,
Leritz, Len
Thorson Publishing Groups, 1991
Buku Teks
Michael Soon Lee with Sensei Grant Tabuchi
American Management Association, 2007
eBooks
Salacuse, Jeswald W., author
American Management Association;, 2008
eBooks