Asimov, I. (1980). Casebook of the Black Widowers. Gollancz.
Chicagoスタイル(17版)引用形式Asimov, Isaac. Casebook of the Black Widowers. London: Gollancz, 1980.
MLA(8版)引用形式Asimov, Isaac. Casebook of the Black Widowers. Gollancz, 1980.
警告: この引用は必ずしも正確ではありません.