Παραπομπή APA

Barker,Ernest. (1965). Principles of social and political theory. Oxford university press.

Παραπομπή Chicago Style

Barker,Ernest. Principles of Social and Political Theory. London: Oxford university press, 1965.

Παραπομπή MLA

Barker,Ernest. Principles of Social and Political Theory. Oxford university press, 1965.