Hixon, T. J. (2006). Respiratory function in singing: A primer for singers and singing teachers. Redington Brown.
Lua i Stíl Chicago (17ú heag.)Hixon, Thomas J. Respiratory Function in Singing: A Primer for Singers and Singing Teachers. Tucson, Ariz.: Redington Brown, 2006.
Lua MLA (9ú heag.)Hixon, Thomas J. Respiratory Function in Singing: A Primer for Singers and Singing Teachers. Redington Brown, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.