Walters, R. (2000). Mezzo-Soprano, Belter. Hal Leonard.
Cita Chicago (17th ed.)Walters, Richard. Mezzo-Soprano, Belter. Milwaukee, Wis.: Hal Leonard, 2000.
Cita MLA (8th ed.)Walters, Richard. Mezzo-Soprano, Belter. Hal Leonard, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.