Emmons, S., & Thomas, A. (1998). Power performance for singers: Transcending the barriers. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Emmons, Shirlee, agus Alma Thomas. Power Performance for Singers: Transcending the Barriers. New York: Oxford University Press, 1998.
Lua MLA (9ú heag.)Emmons, Shirlee, agus Alma Thomas. Power Performance for Singers: Transcending the Barriers. Oxford University Press, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.