Lesikar's business communication : connecting in a digital world/ Kathryn Rentz, Marie E.Flatley & Paula Lentz - 12th ed. - New York.: McGraw-Hill, c2011. - xxvii, 657p . : col. ill. ; 28cm. Includes Index. ISBN: 9780071220972 LC Class. No.: HF5721 / .R422 2011