1. Karpf, A. (2006). The human voice: How this extraordinary instrument reveals essential clues about who we are. London: Bloomsbury.
2. Cavarero, A. (2005). For more than one voice: Toward a philosophy of vocal expression. Stanford: Stanford University Press.
3. Sies, L. F. (1987). Voice and voice disorders: A handbook for clinicians. Springfield: Thomas.
4. Abitbol, J. (2006). Odyssey of the voice. San Diego/Oxford/Brisbane: Plural Publishing.
5. Rees, M. (Ed.). (2007). Voice and gender and other contemporary issues in professional voice and speech training. Bakersfield: Voice & Speech Trainers Association.