(1996). Singer's world: Book 4 : for high voice. Trinity College London.
Chicagoスタイル(17版)引用形式Singer's World: Book 4 : For High Voice. London: Trinity College London, 1996.
MLA(9版)引用形式Singer's World: Book 4 : For High Voice. Trinity College London, 1996.
警告: この引用は必ずしも正確ではありません.