Waterman, R. (2006). The handbook for working singers. Schirmer Trade Books.
Lua i Stíl Chicago (17ú heag.)Waterman, Roma. The Handbook for Working Singers. London: Schirmer Trade Books, 2006.
Lua MLA (9ú heag.)Waterman, Roma. The Handbook for Working Singers. Schirmer Trade Books, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.