Shewell, C. (2009). Voice work: Art and science in changing voices. Wiley, an imprint of John Wiley & Sons.
Lua i Stíl Chicago (17ú heag.)Shewell, Christina. Voice Work: Art and Science in Changing Voices. Chichester, West Sussex, United Kingdom ; [Hoboken]: Wiley, an imprint of John Wiley & Sons, 2009.
Lua MLA (9ú heag.)Shewell, Christina. Voice Work: Art and Science in Changing Voices. Wiley, an imprint of John Wiley & Sons, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.