Smith, J. C. (1976). Legal obligation. The Athlone Press.
Chicago Style aipamenaSmith, J. C. Legal Obligation. University of London: The Athlone Press, 1976.
MLA aipamenaSmith, J. C. Legal Obligation. The Athlone Press, 1976.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.