Ross, R. G. (1970). Obligation: A social theory. University of Michigan Press.
Chicagoスタイル(17版)引用形式Ross, Ralph Gilbert. Obligation: A Social Theory. Ann Arbor: University of Michigan Press, 1970.
MLA(9版)引用形式Ross, Ralph Gilbert. Obligation: A Social Theory. University of Michigan Press, 1970.
警告: この引用は必ずしも正確ではありません.