Helga R. Gudmundsdottir; Carol Beynon; Karen Ludke; Annabel J. Cohen  <br/><br/>
The Routledge Companion to Interdisciplinary Studies in Singing, Volume II: Education 

 -  Taylor and Francis  2020 
<br/><br/><label>ISBN: </label>9781315162607 
<br/><br/><label>Source: </label>EBOOK