APA استشهاد

Yardley, D. C. M. (1986). Principles of Administrative Law (2nd ed.). Butterworths.

استشهاد بنمط شيكاغو

Yardley, D. C. M. Principles of Administrative Law. 2nd ed. London: Butterworths, 1986.

MLA استشهاد

Yardley, D. C. M. Principles of Administrative Law. 2nd ed. Butterworths, 1986.