APA استشهاد

Calvert, H. (1970). Social security law (2nd ed.). Sweet & Maxwell.

استشهاد بنمط شيكاغو

Calvert, Harry. Social Security Law. 2nd ed. London: Sweet & Maxwell, 1970.

MLA استشهاد

Calvert, Harry. Social Security Law. 2nd ed. Sweet & Maxwell, 1970.