APA(7版)引用形式

McDonald Klimek, M., Obert, K. B., & Steinhauer, K. (2005). Estill voice training system. Estill Voice Training Systems International.

Chicagoスタイル(17版)引用形式

McDonald Klimek, Mary, Kerrie B. Obert, , Kimberly Steinhauer. Estill Voice Training System. [Pittsburgh, Pa.]: Estill Voice Training Systems International, 2005.

MLA(9版)引用形式

McDonald Klimek, Mary, et al. Estill Voice Training System. Estill Voice Training Systems International, 2005.