Derrett, J. (1999). Introduction To Legal Systems. Universal Law Publishing.
Chicago Style aipamenaDerrett, J.D.M. Introduction To Legal Systems. Delhi: Universal Law Publishing, 1999.
MLA aipamenaDerrett, J.D.M. Introduction To Legal Systems. Universal Law Publishing, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.