Mackenizie, John
Its show time! how to plan and hold successful sales meetings / John Mackenizie
Illinois: Dow Jones-Irwin, 1989
 Buku Teks
Moss, Stephen R.
What you need to know about documenting your business : how to record critical information about your business processes, tasks and operating standards
Prentice-Hall, 2001
 Buku Teks
Cope, Mick
The seven Cs of consulting : the definitive guide to the consulting process
Financial Times Prentice Hall, 2003
 Buku Teks
Diggs, Steve
Putting your best foot forward / Steve Diggs
Golden Books Centre, 1990
 Buku Teks
Levinson, Nan
How to sharpen your business writing skills
[American Management Association;, ], 2000