DeVore, K., & Cookman, S. (2009). The voice book: Caring for, protecting, and improving your voice. Chicago Review Press.
Dyfyniad Arddull ChicagoDeVore, Kate, and Starr Cookman. The Voice Book: Caring for, Protecting, and Improving Your Voice. Chicago, Ill.: Chicago Review Press, 2009.
Dyfyniad MLADeVore, Kate, and Starr Cookman. The Voice Book: Caring for, Protecting, and Improving Your Voice. Chicago Review Press, 2009.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.