Citazione Stile APA (7a Edizione)

Gierke, O. v. (1951). Political theories of the middle age. Cambridge University.

Citazione stile Chigago Style (17a edizione)

Gierke, Otto von. Political Theories of the Middle Age. Londres: Cambridge University, 1951.

Citatione MLA (9a ed.)

Gierke, Otto von. Political Theories of the Middle Age. Cambridge University, 1951.