Bettinghaus , Erwin P <br/><br/>
Persuasive Communication :  English 
Bettinghaus , Erwin P 
 - USA :  1968 
 - x, 308 p.:  21cm 
<br/><br/><label>ISBN: </label>0030665701 
<br/><br/><label>Gov. Doc. Class. No.: </label>RAF 60