Innes, M. A. (2004). The art of singing. Marc Alan Innes.
Lua i Stíl Chicago (17ú heag.)Innes, Marc Alan. The Art of Singing. Fairview Park, OH: Marc Alan Innes, 2004.
Lua MLA (9ú heag.)Innes, Marc Alan. The Art of Singing. Marc Alan Innes, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.