Heizmann, K. Vocal warm-ups: 200 exercises for choral and solo singers.
Chicagoスタイル(17版)引用形式Heizmann, Klaus. Vocal Warm-ups: 200 Exercises for Choral and Solo Singers.
MLA(9版)引用形式Heizmann, Klaus. Vocal Warm-ups: 200 Exercises for Choral and Solo Singers.
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