McDonald Klimek, M., Obert, K. B., & Steinhauer, K. (2005). Estill voice training system. Estill Voice Training Systems International.
Style de citation Chicago (17e éd.)McDonald Klimek, Mary, Kerrie B. Obert, et Kimberly Steinhauer. Estill Voice Training System. [Pittsburgh, Pa.]: Estill Voice Training Systems International, 2005.
Style de citation MLA (9e éd.)McDonald Klimek, Mary, et al. Estill Voice Training System. Estill Voice Training Systems International, 2005.
Attention : ces citations peuvent ne pas être correctes à 100%.