Mohrman, Susan Albers, author
Berrett-Koehler, 2011
Buku Teks
Hofstede, Geert, author
Van Gorcum, 1976
Buku Teks
Schwab, Donald P, author
New jersey, 2005
Buku Teks
Hesseling, P.G.M.
Pergamon Press, 1982
Buku Teks
Thompson, Arthur A., 1940-, author
Prentice-Hall, 1989
Buku Teks