Doscher, B. M. (1994). The functional unity of the singing voice (Second edition.). Scarecrow Press.
Lua i Stíl Chicago (17ú heag.)Doscher, Barbara M. The Functional Unity of the Singing Voice. Second edition. Lanham, Md.: Scarecrow Press, 1994.
Lua MLA (9ú heag.)Doscher, Barbara M. The Functional Unity of the Singing Voice. Second edition. Scarecrow Press, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.