Dyfyniad APA

Ross, R. G. (1970). Obligation: A social theory. University of Michigan Press.

Dyfyniad Arddull Chicago

Ross, Ralph Gilbert. Obligation: A Social Theory. Ann Arbor: University of Michigan Press, 1970.

Dyfyniad MLA

Ross, Ralph Gilbert. Obligation: A Social Theory. University of Michigan Press, 1970.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.