Withers-Wilson, N. (1993). Vocal direction for the theatre: From script analysis to opening night. Drama Book Publishers.
Παραπομπή σε μορφή Chicago (17η εκδ.)Withers-Wilson, Nan. Vocal Direction for the Theatre: From Script Analysis to Opening Night. New York: Drama Book Publishers, 1993.
Παραπομπή σε μορφή MLA (8th εκδ.)Withers-Wilson, Nan. Vocal Direction for the Theatre: From Script Analysis to Opening Night. Drama Book Publishers, 1993.
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