Allen, M., Malde, M., & Zeller, K. A. (2009). What every singer needs to know about the body. Plural Pub..
Lua i Stíl Chicago (17ú heag.)Allen, MaryJean, Melissa Malde, agus Kurt Alexander Zeller. What Every Singer Needs to Know About the Body. San Diego, CA: Plural Pub., 2009.
Lua MLA (9ú heag.)Allen, MaryJean, et al. What Every Singer Needs to Know About the Body. Plural Pub., 2009.
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