Cita APA (7th ed.)

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.

Cita Chicago (17th ed.)

Wall, Joan, Sheila Allen, Robert Caldwell, i 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.

Cita MLA (9th ed.)

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.