Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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