APA استشهاد

Yardley, D. C. M. (1969). Introduction to British constitutional law (3rd ed.). Butterworths.

استشهاد بنمط شيكاغو

Yardley, D C M. Introduction to British Constitutional Law. 3rd ed. London: Butterworths, 1969.

MLA استشهاد

Yardley, D C M. Introduction to British Constitutional Law. 3rd ed. Butterworths, 1969.