Ultimate book of business letters : customize your letters, memos, e-mails and presentations with the enclosed CD-ROM, by Cheryl Kimball, with Joni van Gelder. Irvine, CA : Entrepreneur Press, c2007. UM W.E.B. Du Bois HF5721 .K54 2007
The AMA handbook of business letters, by Jeffrey L. Seglin with Edward Coleman. New York : AMACOM, c2002. UM Reference HF5726 .S42 2002
