Yardley, D. C. M. (1986). Principles of Administrative Law (2nd ed.). Butterworths.
Chicago Style aipamenaYardley, D. C. M. Principles of Administrative Law. 2nd ed. London: Butterworths, 1986.
MLA aipamenaYardley, D. C. M. Principles of Administrative Law. 2nd ed. Butterworths, 1986.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.