"Langan, J." <br/><br/>
College writing skills / 
J. Langan 
 - 6th 
 - Boston:  "McGraw Hill,"  2004 
 - 586p. 
<br/><br/><label>Subjects--Index Terms: </label>Business communication 
<br/><br/><label>Dewey Class. No.: </label>420