APA استشهاد

Friedmann, W. (1967). Legal theory (5th ed.). Stevens & sons.

استشهاد بنمط شيكاغو

Friedmann, W. Legal Theory. 5th ed. London: Stevens & sons, 1967.

MLA استشهاد

Friedmann, W. Legal Theory. 5th ed. Stevens & sons, 1967.