Cookman, S., & DeVore, K. (2009). The voice book: Caring for, protecting, and improving your voice. Chicago Review Press.
Lua i Stíl Chicago (17ú heag.)Cookman, Starr, agus Kate DeVore. The Voice Book: Caring for, Protecting, and Improving Your Voice. Chicago, Ill.: Chicago Review Press, 2009.
Lua MLA (9ú heag.)Cookman, Starr, agus Kate DeVore. The Voice Book: Caring for, Protecting, and Improving Your Voice. Chicago Review Press, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.