Blum, L. A. (1980). Friendship, altruism and morality. Routledge.
Chicagoスタイル(17版)引用形式Blum, Lawrence A. Friendship, Altruism and Morality. London: Routledge, 1980.
MLA(9版)引用形式Blum, Lawrence A. Friendship, Altruism and Morality. Routledge, 1980.
警告: この引用は必ずしも正確ではありません.