Waterman, R. (2006). The handbook for working singers. Schirmer Trade Books.
Chicago Style (17th ed.) ZitazioaWaterman, Roma. The Handbook for Working Singers. London: Schirmer Trade Books, 2006.
MLA (9th ed.) ZitazioaWaterman, Roma. The Handbook for Working Singers. Schirmer Trade Books, 2006.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.