APA استشهاد

Friedman, W. (1960). Legal theory (ed.4.). Universal law publishing.

استشهاد بنمط شيكاغو

Friedman, W. Legal Theory. ed.4. Delhi: Universal law publishing, 1960.

MLA استشهاد

Friedman, W. Legal Theory. ed.4. Universal law publishing, 1960.