Cita APA (7th ed.)

Behrman, A., & Haskell, J. (2013). Exercise of voice therapy (2nd ed.). Plural Publishing.

Cita Chicago (17th ed.)

Behrman, Alison, i John Haskell. Exercise of Voice Therapy. 2nd ed. San Diego, CA: Plural Publishing, 2013.

Cita MLA (9th ed.)

Behrman, Alison, i John Haskell. Exercise of Voice Therapy. 2nd ed. Plural Publishing, 2013.