Kobbe, G., & Harewood, G. L. (1963). Complete opera book. Putnam.
Chicagoスタイル(17版)引用形式Kobbe, Gustav, , George Lascelles Harewood. Complete Opera Book. London, New York: Putnam, 1963.
MLA(8版)引用形式Kobbe, Gustav, , George Lascelles Harewood. Complete Opera Book. Putnam, 1963.
警告: この引用は必ずしも正確ではありません.