Allen, M., Malde, M., & Zeller, K. A. (2009). What every singer needs to know about the body. Plural Pub..
Citazione stile Chigago Style (17a edizione)Allen, MaryJean, Melissa Malde, e Kurt Alexander Zeller. What Every Singer Needs to Know About the Body. San Diego, CA: Plural Pub., 2009.
Citatione MLA (9a ed.)Allen, MaryJean, et al. What Every Singer Needs to Know About the Body. Plural Pub., 2009.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.