APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (9:e uppl.)

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