Guffey, Mary Ellen. <br/><br/>
Essential of business communication (10th ed) 
Mary Ellen Guffey, Dana Loewy 
 - 10th ed 
 - Boston:  Cengage Learning,  2016. 
 - xviii, 511 p. :  col. ill. ;  28 cm. 
<br/><br/>Include bibliographical reference and index.  
<br/><br/><label>ISBN: </label>9781285858913 
<br/><br/><label>LC Class. No.: </label>HF5718.3   / .G84 2016