Nelson, J. (2017). The voice exercise book: A guide to healthy and effective voice use. National Theatre Publishing.
Chicago-referens (17:e uppl.)Nelson, Jeannette. The Voice Exercise Book: A Guide to Healthy and Effective Voice Use. London: National Theatre Publishing, 2017.
MLA-referens (9:e uppl.)Nelson, Jeannette. The Voice Exercise Book: A Guide to Healthy and Effective Voice Use. National Theatre Publishing, 2017.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.