Dyfyniad APA

Obert, K. B., & Chicurel, S. R. (2005). Geography of the voice.

Dyfyniad Arddull Chicago

Obert, Kerrie B., and Steven R. Chicurel. Geography of the Voice. Think Voice International, 2005.

Dyfyniad MLA

Obert, Kerrie B., and Steven R. Chicurel. Geography of the Voice. 2005.

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