Hill, Charles W.L.
Global business today
Crwin Mcgraw-Hill, 1998
Buku Teks
Hill, Charles W.L.
Global business plan & resource CD-ROM for use with Global business today
McGraw-Hill, 2001
Multimedia
Hill, Charles W.L.
Global business plan & resource cd-rom for use with global business today
Irwin, McGraw-Hill, 2001
Multimedia
Bovee, Courtland L.
Business communication today
McGraw-Hill, 1993
Buku Teks SO
Bovee, Courtland L.
Business communication today
Prentice-Hall, 2005
Buku Teks SO