APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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