Cita APA (7th ed.)

Allen, M., Malde, M., & Zeller, K. A. (2009). What every singer needs to know about the body. Plural Pub..

Cita Chicago (17th ed.)

Allen, MaryJean, Melissa Malde, i Kurt Alexander Zeller. What Every Singer Needs to Know About the Body. San Diego, CA: Plural Pub., 2009.

Cita MLA (9th ed.)

Allen, MaryJean, et al. What Every Singer Needs to Know About the Body. Plural Pub., 2009.