Billingsley, A., & Love, R. (1992). Pop/Rock warm-ups: Vocal warm-up exercises for mixed ensembles in various pop/rock styles and feels (Piano/conductor score.). Belwin Mills.
Chicago-Zitierstil (17. Ausg.)Billingsley, Alan, und Roger Love. Pop/Rock Warm-ups: Vocal Warm-up Exercises for Mixed Ensembles in Various Pop/rock Styles and Feels. Piano/conductor score. Miami, FL: Belwin Mills, 1992.
MLA-Zitierstil (9. Ausg.)Billingsley, Alan, und Roger Love. Pop/Rock Warm-ups: Vocal Warm-up Exercises for Mixed Ensembles in Various Pop/rock Styles and Feels. Piano/conductor score. Belwin Mills, 1992.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.