Hixon, T. J. (2006). Respiratory function in singing: A primer for singers and singing teachers. Redington Brown.
Čikaški stil citiranja (17. izdanje)Hixon, Thomas J. Respiratory Function in Singing: A Primer for Singers and Singing Teachers. Tucson, Ariz.: Redington Brown, 2006.
MLA način citiranja (9. izdanje)Hixon, Thomas J. Respiratory Function in Singing: A Primer for Singers and Singing Teachers. Redington Brown, 2006.
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