Walters, R. (2000). Mezzo-Soprano, Belter (Rev. ed.). Hal Leonard.
Lua i Stíl Chicago (17ú heag.)Walters, Richard. Mezzo-Soprano, Belter. Rev. ed. Milwaukee, Wis.: Hal Leonard, 2000.
Lua MLA (8ú heag.)Walters, Richard. Mezzo-Soprano, Belter. Rev. ed. Hal Leonard, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.