APA استشهاد

Heywood, A. (2015). Political theory: An introduction (4th ed.). Palgrave Macmillan.

استشهاد بنمط شيكاغو

Heywood, Andrew. Political Theory: An Introduction. 4th ed. New York: Palgrave Macmillan, 2015.

MLA استشهاد

Heywood, Andrew. Political Theory: An Introduction. 4th ed. Palgrave Macmillan, 2015.