Wajnryb, Ruth. <br/><br/>
Classroom Observation Tasks :  A Resourcs book for language teachers and trainers / 
By Ruth Wajnryb. 
 - 1st Ed. 
 - New York :  Cambridge University Press,  2010. 
<br/><br/><label>ISBN: </label>9780521407229 
<br/><br/><label>Dewey Class. No.: </label>370.418  / WAJ