Schiavetti, Nicholas. <br/><br/>
Evaluating research in communicative disorders / 
Nicholas Schiavetti, Dale Evan Metz, Robert F. Orlikoff. 
 - 6th ed. 
 - Boston :  Pearson,  2011. 
 - xvi, 432 p. 
<br/><br/><label>ISBN: </label>0132146883 : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Speech disorders--Evaluation--Research.<br/>Audiology--Evaluation--Research.