Wilson, Kevin
AMA handbook of business writing: the ultimate guide to style, grammar, usage, punctuation, construction, and formatting
American Management Association, 2010
 eBooks
Webster's guide to business correspondence
Merriam-Webster, Inc., 1988
 Buku Teks
Merriam-Webster's guide to business correspondence : a merriam-webster
Merriam-Webster's, Incorporated, 1993
 Buku Referensi
Himstreet, William C.
Business communications: principles and methods / William C. Himstreet, Wayne Murlin Baty
Kent Publishing Company, 1984
 Buku Teks
Wilson, Kevin, 1958-
AMA handbook of business writing: the ultimate guide to style, grammar, punctuation, usage, construction, and formatting
American Management Association;, 2010
 eBooks