Citação norma APA

Wall, J., Allen, S., Caldwell, R., & Gavilanes, T. (2012). Diction for singers: A concise reference for English, Italian, Latin, German, French, and Spanish pronunciation (Second edition.). Diction for Singers.com.

Citação norma Chicago

Wall, Joan, Sheila Allen, Robert Caldwell, and Tracy Gavilanes. Diction for Singers: A Concise Reference for English, Italian, Latin, German, French, and Spanish Pronunciation. Second edition. Redmond, WA: Diction for Singers.com, 2012.

Citação norma MLA

Wall, Joan, et al. Diction for Singers: A Concise Reference for English, Italian, Latin, German, French, and Spanish Pronunciation. Second edition. Diction for Singers.com, 2012.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.