Hostetler, Michael <br/><br/>
Advanced public speaking :  a leader's guide / 
Michael J. Hostetler, Mary L. Kahl. 
 - Second edition. 
 - New York :  Routledge,  2017. 
 - Dokument online. 
<br/><br/><label>ISBN: </label>9781315441801 (ebook) 9781315441788 (epub)