singer, p. (1993). Practical Ethics (2nd.). cambridge University Press.
Chicagoスタイル(17版)引用形式singer, peter. Practical Ethics. 2nd. Cambridge: cambridge University Press, 1993.
MLA(9版)引用形式singer, peter. Practical Ethics. 2nd. cambridge University Press, 1993.
警告: この引用は必ずしも正確ではありません.